Duct humidity and temperature sensor with integrated Pressure- and differential pressure transmitter PREMASGARD 8147-Modbus LCD

Maintenance-free microprocessor-controlled PREMASGARD® 814x - Modbus (series) with Modbus connection, in an impact-resistant plastic housing with quick-locking screws, connection piece for pressure hose (Ø 6 mm), plastic sintered filter (replaceable), optionally with/without display, for precise measurement of relative humidity (0...100 % RH) and temperature (-35...+80 °C) in ducts and for measuring the differential pressure (max. ± 7000 Pa) in air. International unit system SI (default) can be switched to Imperial (via Modbus). Incl. mounting flange and connection set ASD-06 (2 m connection hose, two pressure connection nipples, screws).


The pressure sensor is used to measure positive, negative or differential pressures in clean air and gaseous media. It is used in clean room, medical and filter technology, in ventilation and air conditioning ducts, in spray booths, in commercial kitchens, for filter monitoring and level measurement or for controlling frequency converters.

A long-term stable, digital humidity and temperature sensor and a pressure sensor with piezoresistive measuring element guarantee precise measurement results. The following parameters are calculated internally from these measured variables and can be called up via the Modbus: Temperature, relative humidity, dew point, absolute humidity, mixing ratio, enthalpy (disregarding atm. air pressure), differential pressure, volume flow, air density.

Innovative Modbus sensor with galvanically isolated RS485 Modbus interface, switchable bus terminating resistor, DIP switch for setting the bus parameters and bus address in de-energized state, internal LEDs for telegram status display, two separate push-in terminals and large three-line display (illuminated, individually programmable in the 7-segment range and dot matrix range). The sensor is calibrated at the factory; fine adjustment by a specialist is possible depending on the environment.