COMET H7430 – Temperature, Humidity, and Air Pressure Controller with 2 Relays

COMET H7430 T+RH+Pressure Controller 2 Relays RS485 

The COMET H7430 is the ultimate 3-in-1 climate controller with direct control function: it precisely measures temperature, relative humidity, and barometric pressure – and automatically switches two powerful relays (e.g. ventilation, heating, dehumidifier, pressure regulation) when limits are exceeded. In addition, a loud acoustic alarm immediately warns of critical conditions.

Thanks to integrated calculation of dew point, absolute humidity, specific humidity, mixing ratio, and enthalpy, the H7430 can operate fully according to the desired control variable – ideal for clean rooms, museums, server rooms, pharmaceutical storage, production halls, or meteorological applications.

The RS485 interface with Modbus RTU protocol integrates the H7430 seamlessly into any building automation or SCADA system. Three binary inputs allow operation via external signals (door/window open, smoke detector, emergency stop, etc.).

Its robust IP65 housing, operating temperature from –30 to +80 °C, and legendary COMET long-term stability make the H7430 a reliable partner for the most demanding climate and process control tasks.

Why the COMET H7430 is the professional solution for 3-parameter control:

• Three measured quantities in one device: temperature + humidity + barometric pressure
• 2 potential-free relays (2 A / 50 V / 60 VA) – direct load switching
• Control according to dew point, pressure, or any humidity parameter
• Integrated acoustic alarm – immediately audible on site
• 3 binary inputs for external signals
• RS485 Modbus RTU – perfect for BMS and Industry 4.0
• Highest accuracy: Temp. ±0.4 °C | Humidity ±2.5 %RH | Pressure ±1.3 hPa
• Adjustable barometric pressure altitude compensation
• IP65 housing – suitable for harsh environments
• 3-year warranty

Technical data:

• Temperature: –30 to +80 °C (±0.4 °C), resolution 0.1 °C
• Relative humidity: 0 to 100 %RH (±2.5 %RH from 5–95 % at 23 °C)
• Barometric pressure: 600 to 1100 hPa (±1.3 hPa at 23 °C)
• Dew point: –60 to +80 °C (±1.5 °C at T<25 °C and RH>30 %)
• Relay outputs: 2 × potential-free, max. 50 V / 2 A / 60 VA
• Binary inputs: 3 × dry contact / open collector
• Communication: RS485, Modbus RTU, ARION, Advantech ADAM
• Acoustic alarm: built-in beeper, switchable
• Power supply: 9–30 V DC
• Protection class: IP65 (electronics)
• Operating temperature: –30 to +80 °C
• Warranty: 3 years

Perfect for:

• Clean rooms and pharmaceutical production
• Data centers and server rooms
• Museums, archives, libraries
• Food and beverage storage
• Climate chambers and test benches
• Building automation with pressure control
• Meteorological stations
• Multi-parameter process control

Installation & commissioning – done in minutes

Wall mounting with two screws, align the sensor downward, connect relays and power – done. All settings (switching points, hysteresis, alarm delay, altitude correction) can be easily configured within minutes using the free TSensor software or directly on the device.

Summary:

• Transmitter for humidity, temperature and air pressure with two relay outputs
• Suitable for indoor and outdoor use
• Integrated sensors for relative humidity, temperature and pressure
• Measured values are also converted into other humidity parameters: dew point temperature, absolute humidity, specific humidity, mixing ratio and specific enthalpy
• Three binary inputs

Scope of supply:

• H7430
• Operating manual
• Traceable calibration certificate
• Free TSensor software for transmitter configuration