Senzomatic MHT

Installation

1. 1Test each MHT sensor before the site visit using a USB converter and the MoistureGuard desktop application to confirm correct operation.
2. 2Connect the MHT sensor data wires (A and B) to the RS485 port on your ModbusCloud gateway (MCG or MLP series).
3. 3Supply the MHT sensor with 12V DC from a suitable power source, ensuring correct polarity.
4. 4Set the Modbus gateway serial port to 19200 baud, odd parity, to match the MHT default communication settings.
5. 5Assign a unique Modbus slave address to each MHT sensor if multiple sensors share the same RS485 bus.
6. 6Import the MoistureGuard MHT template in the ModbusCloud portal and link it to the configured gateway and slave address.

Things to watch for

01

Why am I not getting any readings from the MHT sensor?

Confirm the baud rate is set to 19200 and parity is set to odd (1 stop bit). Also verify the 12V DC supply is connected and that the A and B data lines are not swapped.

02

What data format do the registers use?

All measurement registers are float32 (two consecutive 16-bit registers). Ensure your gateway is configured to read 32-bit floats with the correct byte order.

03

Can I use multiple MHT sensors on one RS485 bus?

Yes. Each sensor must have a unique Modbus slave address. Use the MoistureGuard desktop application to configure the address before installation.

04

How do I test the sensor before embedding it in the building structure?

Connect the sensor to a PC via a USB-to-RS485 converter and use the MoistureGuard sensor tester application. The converter is optionally supplied with the product.

Registers (13)

13 read / 0 write

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