Belfort Instrument - Precipitation

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Kelly Cole, Ralph Petragnani, Bruce R. Robinson, Nicholas C. Kaufman, Debra S. Alascio, Belfort Instrument, Weather, ASOS, AWOS, Digiwx

727 South Wolfe Street
Baltimore, MD 21231
Tel.: (410) 342-2626
Fax: (410) 342-7028

Belfort WxPak

Specifications | PDF

Real-Time, Site Specific Weather Information

No moving parts – maintenance-free operation
True and apparent wind speed and direction
Barometric pressure
Ambient air and wind chill temperature
Heat index temperature
Relative humidity
Dew point temperature
Internal GPS provides position (latitude and longitude), speed over ground (SOG), course over ground (COG), and time
Two-axis solid-state compass provides heading
Plastic housing is less prone to lightning strikes
RS232 or RS422 output
Belfort graphic software included

The Belfort Ultrasonic WxPak weather station meets a growing need for real time, site-specific weather information. The unit provides accurate data when monitoring weather conditions on-site or in remote locations.

The WxPak Weather Station is the only all in-one weather station that calculates apparent wind speed and direction, barometric pressure, air temperature, relative humidity, dew point and wind chill temperature. With the internal compass and GPS, true wind speed and direction can also be calculated. The UV stabilized, compact housing is fully waterproof and resistant to chemicals lightning strikes.

The only WxPak offering the perfect weather monitoring solution for any application by combining seven sensors into one compact unit with no moving parts.
The lack of moving parts improves reliability, superior accuracy and longevity in the field.
Other weather stations would take at least three separate sensors to achieve all of the weather readings in the WxPak.
Low-cost and easy-to-install on a standard pole with 1” – 14 UNS or 3/4” NPT threads allowing for use as a fixed unit on portable system.
WxPak readings are not affected by common problems associated with mechanical and weather measuring devices such as bearing wear, salt and dirt build-up and birds, all which can result in data inaccuracy or overall failure.
Power and standard RS422 interface capabilities provided by a single cable (various lengths available).
Belfort graphic PC software and USB converter provide a complete solution to connect directly to a PC.

Specifications

Wind Speed Range	0 m/s to 40 m/s (0 MPH to 92 MPH)
Wind Speed Resolution	0.1 m/s (0.1 MPH)
Wing Speed Accuracy @ 0°C to 55°C (320F to 131°F), no precipitation*	Low Wind Speeds: 0 m/s to 5 m/s (0 MPH to 11.5 MPH): RMS error of 0.5 m/s (1.1 MPH) + 10% of reading High Wind Speeds: 5 m/s to 40 m/s (11.5 MPH to 92 MPH): RMS error of 1 m/s (2.3 MPH) or 5% RMS, whichever is greater
Wind Speed Accuracy in wet conditions**	2.5 m/s (5.7 MPH) RMS
Wind Direction Range	0° to 360°
Wind Direction Resolution	0.1°
Wind Direction Accuracy @ 0°C to 55°C (32°F to 131°F), no precipitation*	Low Wind Speeds: 2 m/s to 5 m/s (4.6 MPH to 11.5 MPH) – 50 RMS typica High Wind Speeds: >5 m/s (>11.5 MPH) – 20 RMS typical
Wind Direction Accuracy in wet conditions**	>4 m/s (9.2 MPH) – 80 RMS typical
Compass Accuracy	1° RMS when Level
Pitch and Roll Range/Accuracy	±50° / <1° static tested @ 25°C (77°F)
Air Temperature Range	-25° to 55°C (-13°F to 131°F)
Air Temperature Resolution	0.1°C (0.1°F)
Air Temperature Accuracy	±1°C (+1.8°F)* @ >4 knots (>4.6 MPH) wind
Barometric Pressure Range	300 mbar to 1100 mbar (8.86 inHg to 32.48 inHg, 300 hPa to 1100 hPa)
Barometric Pressure Resolution	0.1 mbar (0.029 inHg. 0.1 hPA)
Barometric Pressure Accuracy	±2 mbar (±0.059 inHg. ±2 hPa) when altitude correction is available
Relative Humidity Range	10% to 95% RH
Relative Humidity Accuracy*	±4% units RH
GPS Position Accuracy	3 m (10’) with WAAS/EGNOS (95% of the time, SA off)
Operating Temperature Range	-25°C to 55°C (-13°F to 131°F)
Supply Voltage	9 VDC to 16 VDC
Supply Current	<150 mA
Weight	258 grams (0.7 lb)
Sensor Baud Rate (RS422 with NMEA 0183 Interface Only)	4,800 BPS (Can be increased to 38,400 bps with command)
Thread Sizes on Base	1-14” UNS or 3/4” NPT
Certifications and Standards	CE, RoHS