- Suitable for measuring the level of water, water-based media, drinking water
- The submersible pressure transmitter is lowered to the bottom of the vessel
- Measuring range 0...0.5 bar/ 0...5 mH2O
- The relative pressure measuring cell ensures an accurate analogue signal and good long-term stability
- Pressure compensation with the ambient pressure by means of a capillary tube integrated in the connection cable with a filter to protect against tube clogging
DescriptionSubmersible pressure transmitters are ideal for level measuring in vessels, waste water systems and wells. The AF903 submersible pressure transmitter is lowered into the vessel together with the cable and measures the hydrostatic pressure of the water column. The actual level is determined in this manner. AF903 has a 10 m long cable and can measure levels of up to 5 mH2O. The submersible pressure transmitter is suitable for drinking water applications, waste water and aggressive media.
The AF903 submersible pressure transmitter demonstrates excellent impermeability at large immersion depths. The stainless steel housing is very robust and boasts a high-quality finish. The relative pressure measuring cell measures the hydrostatic pressure of the water column and converts it into a 4...20 mA signal. A capillary tube is integrated in the connection cable and is used for atmospheric pressure compensation. A filter protects the open end of the tube against clogging. The filter and the cap are included in the scope of delivery.
The ends of the cable are ideally assembled in a watertight junction box or directly in the control cabinet. When assembling, make sure the capillary tube is not kinked, otherwise there will be no pressure compensation. Special autosen cable clamps can be used during assembly to prevent this from happening. Accessories, technical data sheets and further information can be found further down the page.
Technical data AF903
Immerge level transmitter with cable to the ground;
alternatively installation in 1-inch tube
0...0.5 bar / 0...5 mH2O
Outputs / inputs
Direct voltage (DC)
500 V DC
< (supply voltage - 7 V) / 0.02 A
± 0.8 % FS*
incl. zero point, full scale, linearity, hysteresis and repeatability
± 0.5 % FS* / 10K
± 0.25 % FS*
-20 ... 80 °C °C
1 protective filter for the ventilation pipe
CASE = case grounding