Specifications

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FEATURES/BENEFITS
 Barometric Pressure:
± 0.15 hPa (500...1100 hPa /-40...140°F (-40...+60°C)
 Temperature and Humidity:
± 0.9°F (-40...+140°F), ±0.36°F @68°F
± 0.5°C (-40...+60 °C), ±0.2°C @20°C
± 2% RH (0...90 %RH), ± 3 % RH (90...100%RH)
 Remote RH+T probe with 3.5m or 20m cable
 Optional NEMA 4 outdoor installation kit
 RS232C serial interface with NMEA protocol
for GPS use
 12VDC /30mA operation
 Optional LCD display cover
APPLICATIONS:
 Meteorological/Environmental Monitoring
 Calibration laboratory monitoring
 GPS Precipitable Water Vapor detection
 GPS accuracy improvement
THREE-IN-ONE MEASUREMENT
The PTU 200 combines barometric pressure, humid-
ity and temperature measurement in one transmitter.
It can be used to improve the accuracy of GPS
(Global Positioning System) coordinate measure-
ments. Together with the ground-based GPS receiv-
ers, the PTU can also be used to estimate Precipitable
Water Vapor (PWV) in the atmosphere: data which
can be useful in improving weather forecasting
accuracy. The PTU 200 is also an ideal instrument
package for use in calibration laboratories and for
data which can be useful in improving environmental
monitoring applications.
VAISALAS PROVEN SENSOR TECHNOLOGY
The PTU 200 transmitter is based on Vaisalas PTB
220 digital barometer. For pressure measurement, it
uses the BAROCAP® silicon capacitive barometric
pressure sensor. The BAROCAP® has excellent
measurement repeatability and outstanding tempera-
ture and long-term stability. The humidity and
temperature probe uses Vaisalas HUMICAP®180
capacitive thin film sensor for relative humidity
measurement, with better than ±1%RH annual
measurement stability. The temperature sensor is a
platinum RTD sensor.
SERIAL COMMUNICATION
An RS232C serial interface is standard with PTU 200
transmitters. The transmitter software is also compat-
ible with major GPS receivers and NMEA (National
Marine Electronics Association) coded messages. An
optional RS485 interface is also available.
OUTDOOR INSTALLATION KIT
For outdoor use an optimized outdoor installation kit
PTU 200 MIK is available. The PTU 200 MIK includes
a NEMA 4 rated enclosure for the barometer, a static
pressure head and a radiation shield for the humidity
and temperature probe. An optional tripod, the PTU
200 TRIPOD, is available to enable quick field setup.
PTU 200 Combined Pressure, Humidity
and Temperature Transmitter
PTU 200 shown with meteorological
installation kit (PTU 200 MIK) and tripod.
PTU 200