Relative Humidity Sensor With Modbus Output

The SEVEN Relative Humidity Sensor is specifically designed to measure relative humidity and ambient temperature, with an optional pressure measurement feature.

The sensor is supplied with mounting facility, and protected from direct sunlight & radiations by a plastic radiation shield with four aspirated plates that allow the air to pass freely.

Inquiry

Category: Humidity Sensors

Datasheet

Two models are available to meet different customer needs:

3S-AT&RH-MB: Measures Relative Humidity and Ambient Temperature. It can be connected to SEVEN Irradiance Sensor or Sensor Box models.
3S-RH/AT/PS-MB: Measures Relative Humidity, Ambient Temperature, and Pressure. It can be connected to the SEVEN Compact Weather Station.

The measured values can be transmitted to monitoring instruments, data loggers and other receiving units via the serial RS485 interface with MODBUS RTU protocol.

TECHNICAL DATA

Item Code	3S-RH&AT-MB	3S-RH/AT/PS-MB
Measured Data	Relative Humidity Ambient Temperature	Relative Humidity Ambient Temperature Pressure
Sensor Type	Capacitive
Relative Humidity Range	0% to 100%
Relative Humidity Accuracy	±1% RH (20 … 70%) at 25 °C
Relative Humidity Resolution	0,1%
Ambient Temperature Range	-40°C to +85°C
Ambient Temperature Accuracy	±0.1% °C at (5 … 60 °C)
Ambient Temperature Resolution	0.1°C
Pressure Range	–	260 to 1260 hPa
Pressure Accuracy	–	0.5 hPa
Pressure Resolution	–	0.1 hPa
Data Output	RS485 up to 38400 Baud
Communication Protocol	Modbus RTU
Power Supply	12 to 30 V DC
Power Consumption	20 mA max @ 24 VDC
Electrical Connection	3 m LIYYC11Y PUR Cable, UV and Weather Resistant
Operating Temperature Range	-40°C to +85°C
Box Dimensions	64 x 68 x 35 mm (W x L x H)
Shield Dimensions	Ø 105 x 100 mm
Weight	0,5 kg
IP Rating	IP 65
Box Material	ABS
Sensor Housing Material	Stainless Steel Tube – Membran Filter
Shield Material	ABS
Standard	Class A according to IEC 60751:2022 (Temperature) Class A according to IEC 61724-1:2021 (Relative Humidity)