Differential pressure transmitter (Modbus)

The pressure transmitter 699M is used primarily for the monitoring of air and neutral gasses. The unit is optionally available with one or two differential pressure sensors, which allows the observation of differential pressure or volumetric flow at two individual points in the system. This makes the 699M ideally suited for a multitude of tasks in the HVAC industry. The 699M communicates via Modbus® RTU and features two universal inputs in addition to two analog outputs. The linking of further sensors and control of actuators offers the option of using the unit as a decentralized node for existing controllers, extending in- and outputs, and lowering installation costs. The sensors utilized by the unit are based on the unique and well-proven ceramic cantilevered beam technology developed by Huba Control AG.

Products Specification

Medium : Air and neutral gases

Pressure range : 0…500 – 7000 Pa

Output : 0 … 10 V

Accuracy : < ±0.5 fs

Electrical connection : 4 x cable bushing for cable

Pressure connection : Connection pipe Ø 6.2 mm

  • Special snap mounting bracket for easy single handed mounting in sheet steel of varying thicknesses
  • Fully automated manufacture, including in-line adjustment of zero point and full scale value
  • Special design developed for large scale manufacture at an attractive price
  • High accuracy
  • Available with one or two differential pressure sensor units
  • Up to two universal inputs for 0 … 10 V or passive temperature elements
  • Two 0 … 10 V analog outputs
  • Simple installation
  • Reduced wiring effort through decentralized node


Female connector RAST 2.5 with cable 1450 mm : 103167

Female connector DIN EN 175301-803-C : 104244

Female connector DIN EN 175301-803-A : 103510

Connection kit for vent duct (metal) : 104312

Connection kit for vent duct (plastic) : 100064


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