*mydirectindustry

Catalogs
HK INSTRUMENTS
RHT-MOD Duct Humidity transmitter for duct with Modbus

RHT-MOD Duct Humidity transmitter for duct with Modbus

Product catalog summary

Model Summary
The RHT-MOD Duct is a relative humidity transmitter designed for installation in air ventilation ducts. It features Modbus configuration and an illuminated display for easy readability. The device includes a screwless lid and an adjustable mounting flange for easy installation. Key features include separate Modbus output for each measurement parameter (relative humidity and temperature), a mounting flange, and a clear backlit display.

Applications
The RHT Duct series is used to monitor and control relative humidity and temperature levels of incoming and return air in ventilation systems.

Specifications

Performance: Temperature measurement range is 0...50 °C with an accuracy of <0.5 ºC. Relative humidity measurement range is 0–100% with an accuracy of ±2...3% at 0...50 °C and 10–90% rH.
Technical Specifications: Compatible with dry air or non-aggressive gases. Measuring units are °C and % rH. The temperature measuring element is NTC10K, and the relative humidity element is a thermoset polymer capacitive sensing element.
Environment: Operating temperature is 0...50 °C, storage temperature is -20...70 °C, and humidity is 0 to 95% rH, non-condensing.
Physical: Dimensions are 119 x 100 x 44.7 mm for the case and L=188 mm, d=12 mm for the probe. The device weighs 150 g and is made of ABS and PC materials. It has an IP54 protection standard.
Electrical Connections: Includes 4 spring-loaded terminals, power supply of 24 V and GND, and Modbus RTU with A and B line.
Electrical: Supply voltage is 24 VAC or VDC ±10%, with a current consumption of max 90 mA (at 24 V) + 10 mA for each voltage output.
Communication: Uses MODBUS over Serial Line protocol with RTU transmission mode and RS485 interface. The byte format in RTU mode includes 1 start bit, 8 data bits, 1 parity bit, and 1 stop bit. Baud rate and Modbus address are selectable in the configuration menu.
Conformance: Meets CE marking requirements, including EMC Directive 2014/30/EU, RoHS Directive 2011/65/EU, and WEEE Directive 2012/19/EU. The company is certified by DNV GL for ISO 9001 and ISO 14001.

Catalog excerpts

RHT-MOD Duct Humidity transmitter for duct with Modbus-1

USER-FRIENDLY MEASURING DEVICES humidity transmitters rht-mod duct series Humidity transmitters with temperature output for duct that use Modbus serial communication protocol RHT-MOD Duct is a relative humidity transmitter with temperature output installed in air ventilation duct. Illuminated display ensures easy readability also from a distance. The RHT-MOD Duct has a screwless lid and an easily adjustable mounting flange that make the installation of the device easy. RHT-MOD Duct series devices include: • Separate Modbus output for each measurement parameter (rH, T) • Mounting flange • Clear backlit display RHT Duct series devices are commonly used to monitor and control: • Relative humidity and temperature levels of incoming and return air in ventilation system Copyright HK Instruments 2017 www.hkinstruments.fi Datasheet Version 7.0 2017

Open the catalog to page 1

RHT-MOD Duct Humidity transmitter for duct with Modbus-2

HUMIDITY TRANSMITTERS RHT-MOD Duct Series SPECIFICATIONS Performance Measurement ranges: Temperature: 0...50 °C Relative humidity: 0–100 % Accuracy: Temperature: <0.5 ºC Relative humidity: ±2...3 % at 0...50 °C and 10–90 % rH Total error band includes accuracy, hysteresis and temperature effect over 5...50 °C and 10–90% rH. Technical Specifications Media compatibility: Dry air or non-aggressive gases Measuring units: °C and % rH Measuring element: Temperature: NTC10K Relative humidity: Thermoset polymer capacitive sensing element Environment: Operating temperature: 0...50 °C Storage temperature:...

Open the catalog to page 2

All HK INSTRUMENTS catalogs and technical brochures

*Prices are pre-tax. They exclude delivery charges and customs duties and do not include additional charges for installation or activation options. Prices are indicative only and may vary by country, with changes to the cost of raw materials and exchange rates.

Brand list