The Nielsen Kellerman Kestrel 4000 Pocket Weather Tracker is the most comprehensive pocket weather metering device on the market. In addition to measuring the current conditions, it tracks and stores up to 2000 sets of data, and data can be uploaded to a PC with the optional Kestrel Interface. The Kestrel 4500 Pocket Weather Tracker adds wind direction using a built-in digital compass. Both the Kestrel 4000 and Kestrel 4500 include Bluetooth versions.

The mid-range Nielsen Kellerman Kestrel Pocket Weather Meters add on to the features of the Kestrel 1000 and Kestrel 2000 devices to provide true weather metering capabilities. The additional functionality for the Kestrel 2500 includes pressure sensing, and for the Kestrel 3000 relative humidity. The additional functionality for the Kestrel 3500 includes comprehensive environmental data such as dewpoint and heat stress index.

The inexpensive Nielsen Kellerman Kestrel 2000 Pocket Thermo Wind Meter measures the current wind speed, average wind speed, maximum wind gust, air, water, and snow temperature, and wind chill. The Kestrel 2000 Pocket Thermo Wind Meter external temperature sensor is isolated from the case, so that the temperature reading is accurate and not influenced by your hand warming the unit.

The entry-level Nielsen Kellerman Kestrel 1000 Pocket Wind Meter measures the current wind speed, the average wind speed, and the maximum wind gust. The Kestrel 1000 Pocket Wind Meter can easily be switched between mph, km/h, ft/min, m/s, knots and Beaufort.

The Specialty Kestrel Meters and Weather Trackers are devoted to simplifying the jobs of technicians, professionals and enthusiasts worldwide. These Kestrels are application-specific, employing specialized calculations that were previously unavailable or cumbersome to calculate. Some of the measurements available on the Specialty Kestrel Meters and Trackers include CFM, evaporation rate, grains of moisture, air density, absolute pressure, and Delta T.

The Nielsen Kellerman Kestrel NV Pocket Weather Meter and Tracker models have the same features as their more colorful counterparts, but are olive drab or desert tan, with a night-vision preserving backlight which helps users to sustain natural night vision. The Kestrel 4000NV and 4500NV Weather Trackers also include Bluetooth interface versions.

These Nielsen Kellerman Kestrel mounting accessories provide ways that you can mount your Kestrel device in an optimal way for data collection. The Portable Vane Mount additionaly allows your Kestrel 4000 series unit to spin freely in the slightest of breezes.

With the optional Kestrel 4000 Series Serial, or USB, Interface connected to a Kestrel 4000, 4100, 4200 or 4500 device, data can be downloaded for long-term storage, in-depth analysis and detailed charting.

The Kestrel Tactical MOLLE-compatible case is designed for military personnel or other individuals wishing to carry their Kestrel device on a MOLLE/PALS mounting system. And the Nielsen Kellerman Kestrel 4000 Nitelze belt clip case is a sturdy padded nylon case that lets you build a Kestrel 4000 Toolkit perfect for your needs and still carry it on your belt with ease.

The Nielsen Kellerman Kestrel accessories also include a replacement Impeller and an RH Calibration Kit.