Compressed-air thermometer hygrometer with Ethernet interface and relays

Compressed-air ambient humidity, temperature Ethernet sensor with two relay outputs. T+RH probe from hard anodized duralumin for compressed air up to 25 bars with cable. Humidex reading.

Sensor H3531P is designed for online monitoring of temperature, relative humidity of air without aggressive substances. Three binary inputs to detection of two-states signals are the advantage. Other devices are controlled by two relay outputs.

High precision capacitive polymer sensor ensures excellent long term calibration stability and ultimate accuracy. Measured values are also converted to other humidity interpretation: dew point temperature, absolute humidity, specific humidity, mixing ratio and specific enthalpy.

The device is supplied with T+RH probe with 1m cable. Cable lengths 2m or 4m available optionally.

Processing and analysis of measured data:

code

H3531P
Warranty

3 years

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Product variants

Technical data

Measured value

Temperature

Relative humidity

Counted values (dew point…)

Two-state signal

TEMPERATURE SENSOR

Measuring range -30 to +105 °C

Accuracy ±0.4 °C

Resolution 0.1 °C

HUMIDITY SENSOR

Measuring range 0 to 100 % RH

Accuracy ±2.5 % RH from 5 to 95 % at 23 °C

Resolution 0.1% RH

DEW POINT

Measuring range -60 to +80 °C

Accuracy ±1.5°C for dew point temperature +10°C and higher at ambient temperature +25°C
±2.0°C for dew point temperature 0°C at ambient temperature +25°C
±3.0°C for dew point temperature -10°C at ambient temperature +25°C
±6.0°C for dew point temperature -20°C at ambient temperature +25°C

Resolution 0.1 °C

MEASURING THE MOISTURE OF COMPRESSED AIR

Measuring range up to 25 bars

Air flow velocity up to 25 m/s at a pressure of 1 bar (1m/s at a pressure of 25 bar)

RELAY OUTPUTS

Quantity 2

Maximal voltage 50 V

Maximal current 2 A

Maximal power 60 VA

BINARY INPUTS

Quantity 3

Signal for binary inputy dry contact, open collector or two-state voltage signal.
Inputs are not galvanically isolated.

Minimum pulse duration on binary input 500 ms

Voltage across open contact < 3,3 V

Low voltage level 0 to +0,5 V

High voltage level +3,0 to +30 V

GENERAL TECHNICAL DATA

Operating temperature -30 to +80 °C

Channels 1x connectable temperature+humidity probe

Acoustic alarm from built-in beeper - switchable

Counted values humidex, dew point, absolute humidity, specific humidity, mixing ratio, specific enthalpy

Output Ethernet

Measuring interval 2 s

Range of humidity sensor temperature compensation all temperature range

Available temperature units degrees Celsius, degrees Fahrenheit

Communication protocol WWW, ModbusTCP, SNMPv1, SOAP, XML

Alarm protocols E-mail (SMTP authentication is supported), SNMP Trap, Syslog

Power 9-30 Vdc

Protection class IP40

Dimensions 136 x 159 x 45 mm; length/diameter of external probe 150/18 mm

External probe cable length 1 meter

Weight approx. 410 g

Warranty 3 years

Reference

Measurement and control with relay output controllers and recording to COMET Cloud

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