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The Digiquartz®
MET4 MEASUREMENT SYSTEM provides the ultimate in precision
meteorological measurements. Barometric pressure resolution is
better than 1 microbar with total accuracy of better than ±0.08 hPa
over the extended barometric range of 500 to 1100
hPa. Temperature resolution is 0.01 degrees C with total accuracy of
better than 0.5 degrees C
and relative humidity performance is better than
±2%. Desirable
characteristics include durable weatherproof packaging, no warm-up
time, high reliability and long-term stability. Optional
configurations include Barometric Functions (Altimeter Setting,
Station Pressure, Field Pressure, Sea Level Pressure, Density
Altitude, Pressure Altitude, QNH, QFE, and WMO Pressure Tendency
Codes) and/or Data Logging. The measurement
suite can be interfaced with Computer Systems, GPS Receivers, and
Data loggers.
An internal
Digiquartz® pressure transducer, precision
temperature/humidity probe, and microprocessor-based electronics
provide the measurement and communication capabilities.
Measurement data is accessed via RS-232 or RS-485 serial ports. An
external status panel monitors power status and RS-232/RS-485
communication.
The MET4 features the
DigiPort high-performance pressure port. It is designed to
dramatically reduce barometric pressure measurement errors in the
presence of wind
Air temperature and
humidity measurements are provided by a single probe. The probe is
fully calibrated and self contained, providing easy plug and play
interchangeability. The probe is readily accessed by the user for
field replacement.
The air
temperature/humidity probe is housed within a solar radiation
shield. The purpose of the solar radiation shield is to minimize
air temperature measurement errors caused by exposure to direct
sunlight. The MET4 features a simple yet effective passive solar
radiation shield.
The MET4 is designed
for easy and convenient mounting to masts, tubing and other
structures. Mounting hardware is included for easy system integration.
The Digiquartz®
barometer used in the MET4 has a 3-year stability warranty of
better that 0.1 hPa per year and includes a limited 5-year
warranty with the first 2-years covered at 100%. The System
includes a limited one-year warranty. The RH and Temperature probe
is field replaceable and barometer performance can be verified in
the field using the Paroscientific Model 765-16B Portable Pressure
Standard and DigiPort High Performance Pressure Port.
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