Submersible pressure sensor type ABS MD 127

Submersible and highly accurate

MD 127 is a sewage water resistant, stainless steel encapsulated, submersible, hydrostatic level sensor of very high accuracy and over pressure capability. It is designed for level measurement in liquids like stormwater and wastewater in pump sumps. When connecting the 2-wire loop powered sensor in series with a DC power supply, the MD 127 gives a 4 to 20 mA output signal which is proportional to the level of the liquid.

Submersible Pressure Sensor Type ABS MD 127
Main design features

The output signal can be connected to the mA – input of set point relays, chart recorders, indicating instruments, PLC, pump-controls, etc. The number of devices in series and the length of the cable from sensor to the devices is dependant on the supply voltage.
The ceramic sensing element can withstand very high overpressures without damage.

Key characteristics
Measuring Range Max. Overpressure
Cable Length
0 - 1.0 mH2O 4 bar 10 m
0 - 2.0 mH2O 6 bar 10 m
0 - 2.0 mH2O 6 bar 25 m
0 - 4.0 mH2O 6 bar 10 m
0 - 4.0 mH2O 6 bar 25 m
0 - 10 mH2O 10 bar 15 m
0 - 10 mH2O 10 bar 25 m
0 - 20 mH2O 10 bar 25m
0 - 40 mH2O 25 bar 45 m
Technical specifications


Cable PE, shielded
Housing Stainless steel 1.4404
Sensor Ceramic AL203 ,gold coated
Output signal 4 - 20 mA, 2-wire, fixed to the sensors measuring range
Accuracy ≤ ±0.2 % FS @ 25 °C
Response time 200 ms
Supply voltage 9...30 V DC
Ambient temperature -25...80 °C
Temperature coeff. ≤ ± 0.02 % FS/K (Zero)
Long term stability ≤ ± 0.2 % FS p.a.
Protection P 68
Weight of sensor approx. 0.5 kg
Weight of cable 0.5 kg / 10 m
Electrical connection shielded PE cable with pressure compensation capillary and filter
Case studies
  • Sulzer delivered efficient monitoring and drainage pumps package
    The power network in London is almost exclusively underground and serves some of the most sensitive locations in the UK. Sulzer provided power generation company a monitoring and drainage pump solution for managing the risk in case of a flood.

  • Case studies
    Wherever fluids are pumped, mixed, controlled or applied, we are there. See how our solutions create value for customers and learn how we can make your pumping and mixing processes more efficient and profitable, safeguarding your production and ensuring lasting reliability.
  • Commercial waste disposal from toilets
    Commercial wastewater from toilets comprises all sewage water flushed from toilets on commercial, industrial or public properties.

  • Commercial wastewater without toilet waste
    Commercial wastewater without toilet waste includes drainage and grey wastewater.

  • Domestic waste disposal from toilets
    Domestic wastewater from toilets comprises all sewage water flushed from toilets or residential properties.

  • Domestic wastewater without toilet waste
    Domestic wastewater without toilet waste includes drainage and gray wastewater.

  • Network pumping station
    Network pumping stations collect municipal wastewater from residential homes and communal schemes. Installed in dry or wet wells, the pumps deliver the effluent to a terminal pumping station. Since most pumping stations are not equipped with screens, the pumps must cope with difficult materials such as fibrous sanitary and packaging items.

  • Pressurized systems
    Pressurized sewage systems are well suited to outlying locations such as holiday areas and coastal regions, where there may be no direct access to local gravity-based systems. They can also provide an economical alternative to gravity sewers, since they involve smaller pipeline diameters and less excavation.

  • Pumping station control
    Control systems provide functionality and data that can be used to improve the availability of pumps, pumping stations and entire collection networks. They are a simple way to reduce not only the risk of downtime and flooding, but also maintenance and energy costs. Sulzer has a full range of control systems that are as easy to use as they are sophisticated.

  • Storm water pumping station
    During heavy rainfall, storm water pumping stations deliver large volumes of water at low head to receiving surface waters or sewers. Having long been a part of flood management, they are increasingly involved in climate adaptation strategies for low-lying coastal cities.

  • Terminal pumping station
    Terminal pumping stations receive municipal wastewater from network pumping stations. Installed in dry or wet wells, the pumps forward the medium to a treatment plant for final purification. Due to the lack of screens at most pumping stations, difficult materials such as fibrous sanitary and packaging items are a constant threat to uptime.
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