Why am I not getting valid readings from the sensor?

All measurement registers use float32 encoding, which requires reading two consecutive 16-bit registers per value. Make sure your gateway is configured for 32-bit float register reads. Also verify the baud rate is set to 19200 with odd parity.

Can I connect multiple HT sensors on one RS-485 bus?

Yes. Assign each sensor a unique Modbus slave address before connecting them to the same bus. The template can be applied to each address individually in ModbusCloud.

Should I test sensors before installing them on site?

MoistureGuard strongly recommends pre-testing each sensor using their USB converter and the downloadable sensor tester application. This avoids troubleshooting in hard-to-reach locations like sealed cavities or roof structures.

What is the difference between the HT and HT-R models?

The HT-R has more rugged internal component protection and is designed for flat roof installations. Both models use the same Modbus register map and are compatible with this template.

Free Modbus template: Senzomatic HT

The MoistureGuard HT template reads ambient temperature, relative humidity, dew point, and absolute humidity from a combined sensor via Modbus RTU. It supports models HT, HT-R, HT02, and HT03, which are typically installed in building cavities, insulation layers, roofs, and indoor or outdoor environments.

Name	Address	Function	Type	Unit	Access
Temperature	100	FC04	float32	°C	R
Relative humidity	102	FC04	float32	%	R
Teplota rosného bodu	104	FC04	float32	°C	R
Absolute humidity	112	FC04	float32	g/m³	R
Power supply voltage	116	FC04	float32	V	R
Sensor serial number	3001	FC04	uint16		R

Senzomatic HT

Overview

Key readings

Use cases

Installation

Things to watch for

Registers (6)

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