Humidity and Temperature Transmitter

Product Description

The innovative, modular SRH400 humidity (RH) and temperature (T) transmitter consists of a basic unit and various pluggable, interchangeable probes. The basic unit can accommodate one combined S07 RH and T probe or two separate S07 probes, one for RH and one for T. The S07 probes are available in plastic or in stainless steel enclosure and can be plugged onto the basic unit either directly or with M12 extension cables up to 10 m (32.8 ft) long. An optional kit facilitates the mounting of the probes in a duct. The SRH400 basic unit is available with a metal enclosure suitable for wall mount.

The measured values are available on two analog voltage or current (2 wire, 4-20 mA) outputs, as well as on the optional display. One or two point adjustment for RH and T of the transmitter can be easily performed with push buttons on the electronics board of the SRH400 unit. Alternatively, the SRH400 probes can be adjusted individually with the PCA Product Configuration Adapter (see S07 data sheet).

The SRH400 is fully gasketed with a powder-coated finish and die cast construction for aggressive environments. All external hardware is stainless steel.

Robust Design for Challenging Environments

Featuring an IP65-rated enclosure, this transmitter is well-suited for industrial settings where dust and moisture protection are essential. The housing is constructed from durable plastic and stainless steel, ensuring longevity and stable performance across a wide temperature range (-40C to +80C). It can be easily installed on walls or ducts, making it versatile for various industrial HVAC and process control systems.


Accurate and Swift Measurements

Utilizing a capacitive humidity sensor and an RTD temperature sensor, this transmitter delivers measurements with an accuracy of 2% RH and 0.3C. Its fast response time (15 seconds) ensures timely data for process adjustments. The 0.1% RH and 0.1C resolution provides fine granularity, crucial for sensitive applications.


Easy Integration and Versatile Output

The transmitter supports both 4-20mA and RS485 Modbus output signals, offering seamless integration with existing industrial control systems. The LCD digital display provides real-time feedback for onsite operators. With a 24V DC power supply and low power consumption (<2W), the unit is efficient for continuous monitoring operations.