Articles (2020)

Ultralight Outfitters Lightning Access Backpack REVIEW

Innovative frameless backpack with seven individual compartments you can reach without taking the pack off.

Introduction

Ultralight Outfitters is on a mission to make ultralight backpacking an appealing option for all. They have designed several products to sell this practice to the masses, including the Lightning Access backpack, which combined with other lightweight equipment, can reduce total pack weight to 16 pounds for a weekend excursion.

The Lightning Access Backpack is designed with the ultralight backpacker in mind. This pack is specifically intended for those who dread removing their pack repeatedly to access food, water, sunscreen, or whatever the day calls for. It can haul enough for a week-long jaunt, but is also compressible enough for day hikes around base camp.

What’s Good

  • Adjustable for a wide range of body types
  • Thumb loops on hipbelt for resting hands while hiking
  • Compartmentalization for wet and dry storage
  • Several compartments accessible while wearing the pack
  • Light weight saves several pounds over similar sized packs
  • Zig-zag stitching on seams connecting lightweight fabric to dissipate stresses and reduce seam failure

What’s Not So Good

  • Pack is on the heavy end of ultralight frameless packs without comparably increasing durability
  • The seven accessible compartments are small and close together, making them hard to differentiate for access
  • Silnylon compartments are prone to snags/tears and will not hold up to long-term use unless protected
  • Expensive

Specifications

  Manufacturer

Ultralight Outfitters

  Year/Model

2006 Lightning Access Backpack

  Style

Top loading, drawstring closure, top pocket

  Volume

4100 ci (68 L)

  Weight

Measured weight 18 oz (510 g), manufacturer specification 16 oz (454 g)

  Fabrics

Exposed fabric is 210d nylon, lighter fabric is 30d silicone nylon, medium weight grosgrain webbing

  Features

Adjustable to fit persons 5′ to 6’6″, thumb loops to rest your hands while walking, sized to carry bear-proof food canisters, wet compartment for hydration system and water treatment supplies, wet compartment separated from the rest of the pack by a double wall of waterproof fabric, secure storage pocket, seven individual compartments you can reach without taking the pack off

  Volume To Weight Ratio

227.8 ci/oz (based on 4100 ci and 18 oz weight)

  Comfortable Load Carrying Capacity

20 lb

  Carry Load to Pack Weight Ratio

17.8 (based on 20 lb and measured weight of 1.125 lb)

  MSRP

$189.95

Performance

The Outdoor Outfitters Lightning Access backpack is apparently targeted to beginners, and is designed for a specific organizational and packing method developed by the manufacturer. The method is well thought out, and makes good sense, but purchasing this pack is basically a commitment to adopt this particular approach to ultralight backpacking.

The idea is to line the inside of the pack with a sleeping bag and actually pack the rest of the gear inside the bag. Seven ‘lightning access’ pockets are located on the bottom of the pack, and can be reached without removing the pack itself. The largest pocket runs between two water bottle cages and is big enough for snacks and lightweight rain gear. The other, smaller pockets are essentially organizational compartments and can each fit smaller items such as sunscreen, sunglasses, or other on-the-go necessities. There is also a Velcro strip incorporated for closing and securing items in these pockets, which I found hard to open with only one hand while carrying a full pack. The compartment for a hydration system is waterproof.

Although the pack is designed for convenient access to all pockets without taking the pack off, I found it difficult to reach all seven compartments that are advertised as ‘lightning access’ while wearing the pack filled to capacity.

Ultralight Outfitters Lightning Access Backpack REVIEW - 1
Different views of the Lightning Access Pack when protected with a sleeping pad, as per the manufacturer’s packing system.

Most of the pack is constructed of durable 210-denier nylon, but certain parts (pack front and inside pockets) are constructed of less durable silnylon. There is a unique zig-zag stitching to prevent failure at the seams and to maximize use of the lighter weight silnylon. The packing system associated with this pack utilizes a sleeping pad on the outside front of the pack (under the compression straps, see photos) to help support the load and protect the silnylon components of the pack. However, depending on the type and size of the user’s mat, these more delicate areas could remain exposed. This system seems to work best with an inflatable sleeping pad and less so with a foam sleeping pad.

Ultralight Outfitters Lightning Access Backpack REVIEW - 2
(left to right) ‘Lightning Access’ to several pockets while wearing the pack without the protection of a sleeping mat (silnylon exposed).

I tested this pack over the 2006-2007 winter season in Colorado’s Rocky Mountain range. It was employed for varying winter activities, ranging from backcountry skiing to hut trips and winter camping. Although the pack carried well with winter gear, I ended up with several snags in the fabric after the first use; leaving me to question my odds at another successful trip with the Lightning Access pack (my orange sleeping bag is actually visible through the material in the photos below). With further testing on mellow trails, it became clear that the Lightning Access pack is specific for ultralight backpacking on established trails and is not suitable for bushwhacking. Contact with any sharp object is sure to shred the silnylon fabric that connects the 200 denier fabric panels on the main compartment.

The pack profile is wide and the packing system allows for the load to actually mold to the user’s back. This can provide an ideal fit for softer loads. However, loads containing harder objects can make carrying comfort a little trickier. The main compartment can comfortably hold a sleeping bag, clothes, and other camping equipment. It’s also sized specifically to fit bear-proof food canisters.

The fit is fully adjustable to accommodate a wide-variety of heights and the strap system is very straightforward and easy to understand. The hipbelt and shoulder straps are adequately padded for lighter loads, but considering the pack’s volume more padding is needed to comfortably carry loads greater than 15 pounds. The carrying capacity of this pack is adequate for weekend backpacking trips.

Ultralight Outfitters Lightning Access Backpack REVIEW - 3
Different views of the Lightning Access pack: backpanel showing the hipbelt and shoulder straps (left) top pocket (middle), and frontpanel showing side easy-access pockets (right).

Assessment

The Lightning Access Backpack is a suitable backpack for endeavors where light and fast travel is essential. It is particularly suitable for newcomers to ultralight backpacking because it’s built around an effective packing system developed by the manufacturer. The buyer of this pack basically adopts the packing system the pack was designed for. Overall, it makes the entry into ultralight backpacking a little less daunting. There are some unique features that could attract buyers who have specific problems associated with complicated access to gear. Although the ‘Lightning Access’ feature is sound in concept, I found it difficult to reach all seven compartments that are claimed to be reachable while wearing the pack filled to capacity. Finally, at $190 this pack is expensive in my opinion. The fabrics used in the pack are inexpensive, but the sophisticated construction necessary with all those pockets drives the price up.

What’s Unique

The ‘lightning access’ pockets are unlike any other system I have used; the idea of having seven different compartments at your fingertips is an attractive one. It is a creative technique to include packing directions that in theory protect certain areas of the pack in order to use lighter weight fabric, thus lowering the overall pack weight.

Recommendations for Improvement

  • Rework organization of the top pocket to increase accessibility and improve functionality
  • Increase padding on hipbelt and shoulder straps to increase comfort with loads greater than 15 pounds

2007 Birdiepal Umbrellas SPOTLITE REVIEW

For those that love umbrellas, Birdiepal brollies are the lightest available- and they are durable enough to survive the backcountry.

Overview

 2007 Birdiepal Umbrellas SPOTLITE REVIEW - 1
Backpacking with a Birdiepal Swing Liteflex in Olympic National Park.

Using umbrellas when backpacking is a practice that is scoffed at by some and celebrated by others. For those that love using umbrellas like I do, the ability to hike in all-day downpours while wearing lightweight layers under the protection of a lightweight umbrella is sweet. However, the options for lightweight umbrellas in the past have been limited to just a few models by Golite and Montbell. Several exciting new models in the extensive lineup from the German manufacturer Birdiepal will give brolly lovers something to talk about.

 2007 Birdiepal Umbrellas SPOTLITE REVIEW - 2
The Birdiepal Swing Liteflex, Dainty, and Light Trek umbrellas (left to right)

 2007 Birdiepal Umbrellas SPOTLITE REVIEW - 3
The Birdiepal Swing Liteflex, Light Trek, and Dainty umbrellas (back to front)

In the Birdiepal line, there are three umbrellas that are excellent choices for ultralight backpacking:

The Swing Liteflex is a fixed-length umbrella that is great competition for the classic Golite Dome. When compared to the Dome, the Swing Liteflex is a bit lighter and offers slightly greater coverage. The EVA handle of the Swing Liteflex is comfortable to hold and the umbrella stood up well to moderate winds and constant downpours. It is my current favorite for rainforest hikes.

When compared to the compact Montbell U.L. Trekking Umbrella, the Birdiepal Light Trek is heavier but offers full-size coverage, a longer handle, and beefier construction. It is a good choice for those that want an umbrella that packs small but provides full-size coverage.

 2007 Birdiepal Umbrellas SPOTLITE REVIEW - 4
The Birdiepal Dainty is the lightest around and quick to deploy but the fabric panels don’t have the same tension as other models.

The Birdiepal Dainty is very similar in weight and size to the Montbell U.L. Trekking Umbrella but compacts a bit smaller and is easier to open from its compact size (the Montbell requires snapping each aluminum extension into place). However, the Dainty doesn’t provide the fabric tension of the Montbell or the other Birdiepal umbrellas and it tends to flap more in light wind. Still, if you are looking for the lightest umbrella around (by 0.1 oz) and quick deployment is a priority for you, the Birdiepal Dainty is a good choice. I often carry this umbrella as a backup when wearing only a wind shirt and it’s held up well to frequent usage.

For those that spend a lot of time hiking in direct sun, UV reflective umbrellas are a great idea. Like the Golite Chrome Dome, Birdiepal offers reflective Silver Metallic coatings on many of their trekking umbrellas. For a small weight increase and a $3.50 up charge, you can get these special silver umbrellas. While the silver may look a bit space-age, I found them to be very effective in exposed areas on hot summer days. I would seriously consider taking one on my next desert trek.

 2007 Birdiepal Umbrellas SPOTLITE REVIEW - 5
The Birdiepal Swing Liteflex with Silver Metallic Coating (left) and looking directly into the summer sun with the umbrella’s protection (right). (Note the overexposure in the photo of all parts except what was shaded by the angle of the umbrella.)

Here is a comparison of the Birdiepal umbrellas with other popular backpacking models:

Fixed-length Umbrella Comparisons

Birdiepal Swing Liteflex 7.3 oz 24.9 inch length 38.5 inch span $26.00
Golite Dome* 8.0 oz 25.3 inch length 36.1 inch span $25.00

*Manufacturer claim (newer model than mine)

Fixed-length UV Reflective Umbrella Comparisons

Birdiepal Swing Liteflex- Silver Metallic Coating 8.0 oz 24.9 inch length 38.5 inch span $29.50
Golite Chrome Dome 10.0 oz* 25.3 inch length 36.1 inch span $30.00

*Manufacturer claim

Compact Umbrella Comparisons

Birdiepal Light Trek 9.0 oz 10.7-22.9 inch length 38.0 inch span $29.00
Birdiepal Light Trek- Silver Metallic Coating 9.1 oz 10.7-22.9 inch length 38.0 inch span $32.50
Birdiepal Dainty 5.4 oz 6.0-19.5 inch length 33.6 inch span $25.00
Birdiepal Dainty- Silver Metallic Coating 5.2 oz 6.0-19.5 inch length 33.6 inch span $28.50
Montbell U.L. Trekking Umbrella 5.5 oz 9.0-19.6 inch length 33.5 inch span $35.00

Features and Specifications

Birdiepal Swing Liteflex fixed-length umbrella

  • Weight: 7.3 oz (206 g) / metallic: 8.0 (226 g)
  • Weight- case: 1.8 oz (51 g)
  • Length: 24.9 in (63.5 cm)
  • Span: 38.5 in (98 cm)
  • Materials: high density fiberglass shaft and ribs, EVA foam handle and tip, wrist loop, polyester fabric with Teflon coating
  • Features: 8 color options including silver metallic
  • MSRP: $26.00 / metallic: $29.50

Birdiepal Light Trek compact umbrella

  • Weight: 9.0 oz (254 g) / metallic: 9.1 oz (259 g)
  • Weight- case: 1.0 oz (27 g)
  • Length (compact): 10.7 in (27 cm)
  • Length (extended): 22.9 in (58 cm)
  • Span: 38in (96.5 cm)
  • Materials: frame parts: fiber glass, anodized aluminum, and fiber glass polyamide, hard foam grip and tip, polyester fabric with Teflon coating
  • Features: integrated compass in handle, 9 color options including silver metallic
  • MSRP: $29.00 / metallic: $32.50

Birdiepal Dainty compact umbrella

  • Weight: 5.4 oz (152 g) / metallic: 5.2 oz (147 g)
  • Weight- case: 0.4 oz (10 g)
  • Length (compact): 6.0 in (15 cm)
  • Length (extended): 19.5 in (49.5 cm)
  • Span: 33.6in (85 cm)
  • Materials: aluminum frame with fiberglass parts, plastic grip and tip, polyester fabric with Teflon coating
  • Features: integrated compass in handle, 8 color options including silver metallic
  • MSRP: $25.00 / metallic: $28.50

2007 Jacks ‘R’ Better SilNyl Tarp SPOTLITE REVIEW

A tarp that is larger than a stock hammock tarp and extends coverage for wet, cold, and snowy conditions.

Overview

While the stock Hennessy A-Sym rain fly offers good protection in most 3-season conditions, there are times that you want more coverage. In nasty conditions the Jacks ‘R’ Better (JRB) SilNyl rain fly offers some key advantages over the stock Hennessy rain fly.

Jacks R Better SilNyl Tarp SPOTLITE REVIEW - 1
The Jacks ‘R’ Better JRB SilNyl Tarp offers more coverage than a stock Hennessy rain fly and tensions independent of the hammock.

First, the stock A-Sym fly is asymmetrical (measuring 8 feet on two sides and 5 foot 6 inches on the others) to match the A-Sym hammock. The JRB SilNyl is a 7 foot 8 inch square and extends closer to the ground to provide additional protection and it extends closer to the ground. The square shape also creates a better catenary curve

when staked which helps maintain even tension and better performance in windy conditions.

Another aspect of the SilNyl tarp is that, unlike the Hennessy rain fly, it is set up independent of the tarp. With a stock Hennessy fly is sometimes difficult to maintain even tension because it attaches directly to the hammock lines; when the lines stretch under user weight, the fly also loses tension. However, the SilNyl tarp is unaffected by the hammock because it is set up with its own guy lines.

While this independent setup is great for maintaining even tension it also creates an additional step when setting up your hammock. While the stock fly is set up simultaneously with the hammock, the SilNyl tarp must be set up separately. However, this does give a dry area when setting up or taking down your hammock in the rain, a feature I appreciated during downpours and heavy snow.

Last, the SilNyl offers additional guyout points over the stock fly for use in storm conditions or when using the tarp in a non-hammock setup.

While the stock Hennessy Hyperlight Backpacker A-Sym rain fly weighs 7.9 ounces, the JRB SilNyl weighs 9.3 ounces or 10.1 ounces with the optional Self Tensioning Lines. This is a weight increase of 1.4 ounces or 2.2 ounces with the guy lines.

I used the SilNyl tarp with the optional JRB Self Tensioning Lines. These guy lines include a Therma-Band elastic section that is stretched when pitching the fly and keeps the fly taut as it stretches through the night. At 0.8 ounces for the pair, they aren’t the lightest option but were a great addition to this setup and kept the tarp taut through big temperature changes.

Jacks R Better SilNyl Tarp SPOTLITE REVIEW - 2
The optional Self Tensioning Guy lines. Note that the tarp is set up below the hammock lines.

I found the SilNyl tarp to be well built and very durable during testing. It provided excellent coverage through windblown rain, hail, and moderate snow accumulation and was an integral part of my four season hammock kit which included the Hennessy Hyperlight Backpacker A-Sym hammock, the Jacks ‘R’ Better Ultimate 4 Season Quilt Set, and the Gossamer Gear ThinLight °” Wide Insulation Pad.

Features and Specifications

● Weight- tarp: 9.3 oz (265 g); mfr claimed 9.4 oz (266 g)

● Size (measured): 7 ft 6 in x 7 ft 6 in (229 cm x 229 cm); mfr claimed 7 ft 2 in x 7 ft 2 in (218 cm x 218 cm)

● Materials: silicone-impregnated 1.1 oz. ripstop nylon Cordura®

● Tie outs: ten tie-out/lift tabs

● Features: Square shape with a 10 ft 4 in diagonal ridgeline for use with hammocks

● Accessories: Self Tensioning Lines $9.95, 0.8 oz (22g)

● MSRP: $79.95

Kestrel 4000 Pocket Weather Tracker REVIEW

The Kestrel provides the technically-minded backpacker much more useful information than a multi-function watch, and is easier to use.

Introduction

Kestrel 4000 Pocket Weather Tracker REVIEW - 1
The Kestrel 4000 Pocket Weather Tracker measures myriad parameters-including wind speed and elevation-and stores them in memory for field review and later downloading.

If you’re a person who wants to know the actual numbers:

  • What was the wind speed on top of that peak?
  • What is the wind chill right now (wind chill is the combined effect of the wind and temperature)?
  • Why does if feel so miserably hot right now (the heat index measures the combined effect of temperature and humidity)?
  • Why did we get so much condensation in the tent last night, but not the night before?
  • How cold did it get last night, and how much colder is it on the valley floor?
  • How much warmer is it in my tent compared to outside?

If you “need to know,” then you are a good candidate to own a Kestrel Pocket Weather Tracker. Nielsen-Kellerman makes a full line of Kestrel weather instruments ranging from a minimal feature set (model 1000) to the “top dog” (now the 4500) that measures a wide range of environmental conditions. The 4000 series stores data and uploads it to a computer for later evaluation, even charting. The 4000 even measures barometric pressure and has a barometric altimeter that is easy to set and use. Future generations will probably include a GPS!

This remarkable hand-held gadget weighs only 3 ounces, is rugged and waterproof, and is well worth the weight if you’re someone intrigued by the above questions and who wants to more fully document your trips. How useful is the Kestrel 4000, and what are the pros/cons of using it compared to a typical multi-function watch?

What’s Good

  • Lightweight and compact
  • Measures numerous environmental conditions
  • Easy user interface
  • Long battery life (uses two inexpensive AAA batteries)
  • Easy to record, upload, and graph data
  • Waterproof and durable
  • Fast equilibration

What’s Not So Good

  • No trekking pole attachment for use in camp
  • Data storage parameters are not user-selectable
  • No stopwatch function

Specifications

  Manufacturer

Nielsen-Kellerman, Inc.

  Year/Model

2006 Kestrel 4000 Pocket Weather Tracker

  Weight

Measured weight 3.6 oz (102 g) with 2 AAA batteries, manufacturer specification 3.6 oz (102 g)

  Dimensions

5 in high x 1.75 in wide x 0.75 in thick (13 x 4.5 x 2 cm)

  Features

Measures wind speed, temperature, humidity, wind chill, heat index, dew point, wet bulb temperature, barometric pressure, altitude, and density altitude; displays minimum, maximum, and average for each parameter; displays graph for each parameter; backlit display; time and date; user customized screens to display selected measurements; flip-top impeller cover; automatically store up to 2,000 measurements, even when the unit is turned off; manually store measurements with the press of a button; exterior temperature, humidity, and pressure sensors for fast and accurate readings; upload, save, and graph measurements with data interface

  What’s Included

Instrument, wrist and neck lanyards, 2 AAA batteries, soft carry pouch, instruction manual

  MSRP

$329

  Options

USB Data Interface $109, serial Data Interface $79, USB cable $34, portable tripod $25, carry case $19

Performance

The Kestrel 4000 Pocket Weather Tracker, as the name implies, is a handheld device. Its capabilities are remarkable, measuring and recording virtually any weather-related parameter one might want to know. Its capabilities go far beyond those of the average multi-sensor watch (though a typical multi-sensor watch has a digital compass, which the Kestrel 4000 lacks. The new Kestrel 4500 adds that feature, and more).

User Interface

The Kestrel has a simple and straightforward user interface (finally, a manufacturer gets it right!). Displayed text can be set in one of five languages (English, French, German, Italian, and Spanish). I won’t describe the navigation functions in detail (essentially re-writing the user manual) but suffice it to say it’s easy to learn and very intuitive compared to a typical multi-function watch. Each screen tells the user what button to press to back up or go forward. The LCD screen itself is easy to read (crisp and high-contrast) and has a backlight button for night viewing.

Kestrel 4000 Pocket Weather Tracker REVIEW - 2
The user interface on the Kestrel is simple and intuitive. The red power button is on the lower left. The upper left button manually stores data at any time. The upper right button illuminates the LCD screen. The center five buttons navigate through the various display screens. Overall, it’s simple and easy to learn and use.

Measurement screens can be hidden from normal navigation by setting them to “on” or “off” in setup mode. For example, if heat index is not of interest it can be de-selected so the instrument doesn’t cycle through it in navigation mode.

Measurements

Upon startup, the Kestrel 4000 displays the day, date, and time. It directly measures or calculates wind speed, temperature, relative humidity, wind chill, heat index, dew point, wet bulb temperature, barometric pressure, altitude, and density altitude (other models different sets of parameters). For each parameter it will display the minimum, maximum, and average. It will also graph each parameter within a user-selected range.

Kestrel 4000 Pocket Weather Tracker REVIEW - 3
The Kestrel 4000 has three screens for each parameter: current condition (center), graph of recent conditions (left), and min-avg-max (right). On the graph screen (left), the user can access recent data for each parameter, for example the temperature was 40 °F on Mar 27 at 4:25 AM.

In addition, the Kestrel has three user screens, and each can be set to display three parameters at once. Charts and min-max-avg are not available for the user screens.

Sensors

The Kestrel is a scientific instrument. Documentation and data are provided on the type of sensors used and their accuracy. The temperature and humidity sensors are exposed to the air in an opening at the top of the instrument (see top-detail photos) to enable a faster response to changes. The pressure sensor is on the backside of the instrument. The impeller for wind speed measurements is protected by a swivel plastic cover to protect it when not being used. It has a precision axle and sapphire bearings for enhanced sensitivity.

Kestrel 4000 Pocket Weather Tracker REVIEW - 4
To speed up the response time, the temperature and humidity sensors (left side) are located in an opening that exposes them directly to the air. The wind sensor (top right) is enclosed by a flip-open plastic cover to ward off dust and impacts when not in use.

Temperature and humidity response time is less than a minute-it helps to wave the instrument in the air to speed up the equilibration. The wind speed impeller will measure breezes as little as 0.8 mile per hour to hurricanes up to 135 miles per hour. Temperature accuracy is plus or minus 1.8 °F; humidity and wind speed accuracy is plus or minus 3%.

The Kestrel 4000 is completely waterproof, so can be used in weather of all kinds (as you’d hope a weather instrument would be). You can even dunk it in a stream to measure the water temperature or stick it into a snowbank to determine snow temperature.

Barometric Pressure and Altitude Adjustment

Since these parameters constantly change, the Kestrel must be set to a known value before it can deliver accurate measurements in the field. The best way to calibrate it before a trip is to visit a weather website and determine the current barometric pressure for your present location. It is easy to adjust the current barometric pressure and altitude on the Kestrel, and it’s noteworthy that you only have to know ONE of the values in order to calibrate the Kestrel so it will show accurate readings for BOTH barometric pressure and elevation. This is much easier than any multi-sensor watch I have used!

Since a barometric altimeter bases changes in altitude readings on changes in barometric pressure, accuracy depends on how steady the barometric pressure is. I found the Kestrel’s altimeter works very well, consistently providing readings within 50 feet of the actual value on the same day of calibration. In the field, a topographic map can be used to check and reset the altitude as needed. Specific surveyed pass, peak and lake elevations are very helpful in this regard.

Battery Life

Two AAA batteries power the Kestrel 4000, and the opening screen lists the battery life remaining. I used the Kestrel for five months, with intensive use of the data storage function, and still had 85% of the battery life left. Suffice it to say that a pair of batteries will last a long time!

Data Storage

A unique feature of the Kestrel 4000 series is data storage to memory for later retrieval. It stores 480 data points for each parameter. For example, if you set the record rate interval to 20 minutes, you can store 28 days of uninterrupted data.

There are two ways to store data. The first is to push the Manual Memory button to store data instantaneously, for example, for a specific location or weather condition. The second method is to switch the Auto Store function “on.” The Kestrel will then store data at the set interval until it is switched off, or the memory becomes full. The Kestrel does not display memory use status, but it does have a user-selectable overwrite mode that enables data recording to continue (if desired) by discarding the oldest data.

Data Retrieval

The Kestrel Interface is required to upload stored data from a Kestrel 4000 series Weather Tracker to a computer. Doing so enables permanent data storage, in-depth analysis and charting. The interface and data cable are available for either a serial or USB port connection. It uses an optical reader that aligns with two transmission ports on the back of the instrument. The communication software included with the interface is easy to install and use.

Kestrel 4000 Pocket Weather Tracker REVIEW - 5
Kestrel 4000 mounted on the Kestrel Interface. The data uploading process is simple and fast: turn the Kestrel on, put it on the interface, open the communication software, click on “communicate,” upload the data, and save it to a specified file. It’s very simple and fast. The data log can be cleared through the interface or manually, on the instrument itself.

Kestrel 4000 Pocket Weather Tracker REVIEW - 6
Sample data set uploaded from the Kestrel 4000. Data storage parameters are not user-selectable; the Kestrel records data for all parameters. Data are saved to a *.csv file (comma deliminated text file) that is easily imported into Microsoft Excel for management and graphing. The software also allows you to save remarks about the data in a *.rem file.

Utility

I found the Kestrel 4000 and its data storage function invaluable when field-testing outdoor gear. In the field I can read the actual temperature, wind speed, etc. any time I need to. Armed with the Kestrel, it’s also fun to challenge my hiking companions to “guesstimate” the wind speed and find out who’s closest. We do the same for air temperature, water temperature, snow temperature, surface temperature, the overnight low temperature, etc. Fun!

To evaluate the environment inside a shelter at night, I routinely suspend the Kestrel from the ceiling and record conditions. The temperature, humidity, and dew point measurements are most relevant for this purpose. At home I upload the data, graph it in Microsoft Excel, and evaluate the data in relation to my notes on the weather conditions, observed condensation, amount of venting, etc.

Kestrel 4000 Pocket Weather Tracker REVIEW - 7
(Left) The Kestrel 4000 suspended from the ceiling of an igloo to record interior conditions. (Right) Measuring wind speed with the Kestrel.

Kestrel 4000 Pocket Weather Tracker REVIEW - 8
An example of graphed data taken with the Kestrel 4000. The Kestrel was set to record data at 10-minute intervals overnight in an 11-foot diameter igloo. The data show interior humidity (purple line) was high when the igloo was occupied between 5:30 PM and 9:50 AM. The inside temperature (blue line) reached the dew point (yellow line) about 9:30 PM, at which time condensation formed on the interior walls. The outside temperature (orange line) was recorded using a separate device and added to the graph.

A remote temperature sensor accessory for the Kestrel (which will hopefully be available at some point) would enable it to be used to simultaneously record temperatures inside and outside (or at any two remote locations). In the above graph, for example, it would have been very handy to place a remote temperature sensor outside the igloo and transmit data to the Kestrel, rather than using a separate device and merging the data. An immersible remote thermometer might even help in the mountain kitchen.

Assessment

The Kestrel 4000 is a superb instrument for measuring field environmental conditions. It is lightweight (for such a complete and sophisticated device), rugged, waterproof, easy to use and accurate. Importantly, it stores data for later in-depth analysis or charting. For the more technically inclined backpacker, this 3-ounce powerhouse provides loads of useful information.

Compared to most multi-function watches, the Kestrel 4000 has the following advantages:

  • It has additional functions (wind speed, wind chill, humidity, dew point, heat index, wet bulb temperature, density altitude)
  • The temperature reading is accurate (on a watch the temperature is influenced by the user’s body temperature)
  • The user interface is much simpler and easier to navigate
  • It records data, and uploads it to a computer

However, there are a few disadvantages:

  • It does not have chronometer (stopwatch), alarm, and digital compass functions
  • Its heavier, 3 ounces compared to about 2 to 2.5 ounces
  • It’s easier to lose (I recommend getting it with an orange case so it’s more visible)
  • It’s more expensive, $329 compared to $150-$200 for many multi-function watches

The new Suunto X6 ($329) multifunction watch is probably the closest comparison to the Kestrel 4000. It has a limited memory function to store lap times and an altitude profile. The number of features embedded into the X6 is remarkable, but one has to navigate through layer upon layer of menus to get to desired functions.

The Kestrel 4000 can be used with an optional portable vane mount to allow the unit to spin freely in the slightest of breezes and perform as a miniature weather station. In fact, it has served that purpose on expeditions. The new Kestrel 4500 would be a better choice for that application because it includes a digital compass that enables it to calculate crosswinds and headwinds/tailwinds (all in reference to a user-set direction or target).

Overall, the Kestrel 4000 (and other, less expensive Kestrel models) is especially suited to measuring environmental parameters related to outdoor sports, and is the prefect companion for the technical-minded backpacker. In many ways, the Kestrel 4000 is much more useful to a backpacker than a GPS. You may even want to drop a hint to your spouse to get you the Kestrel 4000 for your birthday or Christmas, instead of a GPS!

What’s Unique

The Kestrel 4000 provides more useful information and is easier to use than a multi-function watch, and will store data for uploading to a computer and charting.

Recommendations For Improvement

  • Add a stopwatch function, and perhaps an alarm clock and altitude alarm
  • Provide a Velcro strap so the Kestrel can be attached to a trekking pole in camp
  • Allow stored data parameters to be user-selectable
  • Offer a remote temperature sensor so temperature can be recorded in two (or more) locations at the same time