Discontinued Products
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Food & Dairy
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Data Acquisition & Logging
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UV Measurement
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Air Safety
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Modified Atmosphere Packaging / Gas Flushing
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Near-Infrared (NIR)
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Test Kits
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Milk Analysis
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pH and Temperature
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Refractometry & Density
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Microscopy
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Stirring & Mixing
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Water activity / Moisture
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Viscosity & Rheology
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Weighing Solutions
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Colour Analysis
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Permeation
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Atago
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Grain
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Feed
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Soil, Science & Environment
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Discontinued Products
VP-4 Humidity Temperature and Vapor Pressure Sensor
The VP-4 Vapor Pressure/Humidity/Temp Sensor with Radiation Shield measures air temperature and relative humidity and outputs all three values as a digital sensor. Plug-and-log capabilities with the Em50 line of data loggers.
VP-3 HUMIDITY TEMPERATURE AND VAPOR PRESSURE SENSOR
Relative Humidity, Air Temperature, and Vapor Pressure
Use the robust VP-3 sensor with soil moisture probes in microclimate and evapotranspiration studies
SDI-12 Compatible
Link with non-Decagon data loggers with the easy-to-use SDI-12 communication protocol.
Compact
This 5 cm x 2 cm sensor is able to fit into the smallest of spaces.
Weatherproof
Thanks to its unique Teflon screen, the relative humidity sensor can survive considerable waterflow. Naturally, it won't be transmitting precisely while waterlogged; but as soon as it has dried out, it's back to full functionality.
Fast Response
The Teflon screen protects the sensor from liquids and dust without hindering diffusion of water vapor. The protected sensor is still able to rapidly respond to differences in humidity.
Integrated Temperature for Accuracy
Accurate relative humidity readings need precise air temperature readings taken at the same place and time. This sensor takes both measurements at the same time for the best possible precision.
Radiation Shield Included
The contained radiation shield is engineered to improve air temperature readings by minimizing radiation and maximizing airflow over the face of the sensor. Specifically engineered to maintain the correlation between actual air temperature and sensor air temperature while keeping the shield size minimal.
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HUMIDITY RESOLUTION |
0.1% RH |
|---|---|
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TEMPERATURE RESOLUTION |
0.1°C |
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VAPOR PRESSURE RESOLUTION |
0.01 kPa |
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HUMIDITY RANGE |
0-100% RH |
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TEMPERATURE RANGE |
-40°C to 80°C |
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VAPOR PRESSURE RANGE |
0-47 kPa |
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SENSOR TYPE |
Digital Capacitance and Thermistor |
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OUTPUT |
RS232, SDI-12 |
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OPERATING ENVIRONMENT |
-40°C to 80°C |
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CABLE LENGTH |
5 m |
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CABLE CONNECTOR TYPES |
3.5 mm 'stereo' plug or three-wire |
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POWER REQUIREMENTS |
3.6-15 VDC, 0.03 mA quiescent, 4 mA during 300 ms measurement |
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SENSOR DIMENSIONS |
5.4 cm x 1.96 cm |
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RADIATION SHIELD DIMENSIONS |
8.9 cm height, 10.16 cm diameter, 13.34 cm wide (bracket) |
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DATA LOGGER COMPATIBILITY (NOT EXCLUSIVE) |
Decagon Em50 series (firmware 2.11 or newer), ProCheck C (Rev 1.5), Campbell Scientific |
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WARRANTY |
One year, parts and labor |
Operating Temperatures: -40 °C to 80 °C Suitable For: Research Monitoring Irrigation Management Soil, Moisture, Temperature Measurement Fertiliser Control Soil / Fertiliser Drainage Water Level Monitoring Micro-climate and Canopy
