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Maintenance-free, microprocessor-controlled PREMASGARD® 724x - Modbus (series) with Modbus connection, in an impact-resistant plastic housing with quick-locking screws, connection nozzles for pressure hose (Ø 6 mm), with cable gland or M12 connector according to DIN EN 61076-2-101, optionally with/without display, for measuring the differential pressure (2 measuring channels, max. ± 7000 Pa) in air. Type variant 724x T with connection facility for external Pt1000 sensor (sensor element not included in the scope of delivery) for detecting the temperature (–50...+150°C). International system of units SI (default) can be switched to Imperial (via Modbus). Incl. connection set ASD-06 (2 m connecting hose, two pressure port nipples, screws).

The pressure sensor is applied to measure positive, negative or differential pressure in clean air and gaseous media. It is used in the clean room, medical and filter technology, ventilation and air conditioning ducts, spray booths, large-scale catering facilities, for filter monitoring and level measurement or for triggering frequency converters. A pressure sensor with piezoresistive measuring element guarantees exact measurement results. The following measured values can be accessed via the Modbus: Differential pressure, volume flow and temperature.

Innovative Modbus sensor with galvanically separated RS485 Modbus interface, selectable bus termination resistance, DIP switch for setting the bus parameters and bus address in current-free state, internal LEDs for telegram status display, two separate push-in terminals and large threeline display (illuminated; with customised programming in the 7-segment and dot-matrix range). The sensor is factory-calibrated; an environmental precision adjustment by an expert is possible.

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Voltage supply
24 V AC (± 20 %) and
15…36 V DC
Power consumption
< 4.8 W/ 24 V DC typical; < 6.8 VA/ 24 V AC typical
Data points
Temperature, differential pressure
Measuring range, temperature
Operating range, temperature
typically ± 0.2 K at +25 °C
Media temperature
–20...+50 °C
Pressure connection
with connection nozzles for pressure hose Ø 6 mm
Type of pressure
differential pressure
Zero point offset
< ± 0.7 % of final value
Above- below-pressure
máx. ± 50 kPa
Ambient temperature
–30...+70 °C
clean air and
non-aggressive, non-combustible gases
Bus protocol
Modbus (RTU mode),
address range 0...247 selectable
Signal filtering
0s, 1s, 10s
Sensor protection
plastic sinter filter, Ø 16 mm, L = 35 mm, exchangeable
(optional metal sinter filter, Ø 16 mm, L = 32 mm)
Electrical connection
0.2 - 1.5 mm2, via push-in terminal
Housing dimensions
126 x 90 x 50 mm (Tyr 2)
Cable gland
2x M 16 x 1.5; including strain relief, exchangeable
Long-term stability
± 1 %/ year
Sum of Linearity+hysteresis
< ± 1 % of final value
Temperature drift values
± 0.1 %/ °C
Protection class
III (according to EN 60 730)
Protection type
IP 65 (according to EN 60 529) housing only! (PLEUROFORM IP 30)
Cable connection
cable gland, plastic (M 16 x 1.5; with strain relief,
exchangeable, max. inner diameter 10.4 mm) or
M12 connector (male, 5-pin, A-code)
according to DIN EN 61076-2-101 (optional on request)
CE conformity,
electromagnetic compatibility according to EN 61326,
according to EMC Directive 2014/ 30/ EU

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