LMK382 Low Range IP68 Waste Water Level Transmitter

LMK382 Low Range IP68 Waste Water Level Transmitter

Submersible Low Range waste water level transmitter with intrinsically safe option for monitoring the level of sewage and effluent in water treatment plants.

Product Parameters

  • Hydrostatic Pressure Range: from 0.4 up to 100 mWG
  • Accuracy: 0.35% or 0.25% FS IEC 60770
  • Output Signal: 4-20mA, 2 wire current loop or 0-10vDc, 3 wire
  • Electrical Connection: IP68 submersible gland with PVC, PUR, FEP or TPE shielded cable
  • Pressure Connection: Flush ceramic diaphragm with protective nose cone
  • Media Compatibility: Stainless steel 316l body, Ceramic Al2O3 (96%) diaphragm, FKM, FFKM or EPDM seal gasket plus selected cable jacket
  • Dimensions: 39.5 mm diameter
  • Weight: 400 g
  • Special Options: ATEX certified to II 1 G EEx ia IIC T4, vented cable junction box with PT100 transmitter and/or overvoltage protection circuit, flange or pipe mounting, 125 degC max temperature for submersion with TPE cable, HART communications

Product Description

The LMK382 waste water level sensor has a stainless steel housing and a flush ceramic diaphragm which prevents clogging and facilitates cleaning.

Available in level ranges from 0.4 up to 100 meters of water gauge.

Product Applications

Genset daily tank fuel level

Monitoring fuel level in daily tanks of gensets with fuel temperature up to 85 °C.

  • SKU ID: s1-lmk382-0001
  • Part No: 566-3000-1-2-E-1-4-3-005-000
  • Pressure Range: 0 to 3
  • Units: mH2O
  • Reference Type: Gauge / Vented (atm to +P)
  • Output Signal: 4-20mA, 2 wire
  • Accuracy: 0.35% FS
  • Installation Type: Probe version with nose cone
  • Housing Material: Stainless Steel 316L
  • Diaphragm Material: Ceramic Al2O3 96%
  • Media Exposed Seals: FKM
  • Cable Type: TPE (125degC max)
  • Cable Length: 5
  • Cable Length Units: Metres (m)
  • Optional Extras: ATEX Intrinsic safety approval

Product Help

Removing nose cone

Is the submersible cone on the LMK382 removable and will it have a deleterious effect if removed?

Yes, if you remove the nose cone carefully as described in the operating manual it will not cause any harm or damage ot the sensor.

However an exposed flush diaphragm will be vulnerable to mechanical damage so we only recommend removing just before installing.


Absolute range

Is it possible to make an absolute version of the LMK382 submersible waste water pressure transmitter?

Yes, although it is not mentioned on the data sheet currently, it is possible to provide absolute ranges as a custom option from 1 bar up to the maximum range of 10 bar absolute.

Fitting tapered threads with flush diaphragm

Is it possible for the threaded flange mount version of the LMK382 flush level transmitter to be provided with a tapered thread on the outside of the transmitter, instead of the standard parallel thread?

Sorry no, not for the LMK382, generally it is not possible to use tapered threads with an exposed flush sensing diaphragm due to the close proximity of mechanical stresses generated by tightening this type of thread. The induced stresses on the diaphragm can affect calibration settings, particularly with low pressure ranges, and in worst cases cause the sensing diaphragm to fail.

Flange size options

We would like to use the LMK382 waste water hydrostatic level transmitter for measuring the amount of sludge inside a storage tank. We intend to install it using the flange version, but can the sensor be supplied with a flange or do we have to find a separate supplier for this?

The flange can supplied as a separate item for screwing onto the LMK382 sensor, you can choose from 3 different flanges: DN25, DN50 or DN80, as described in the table below.

Flange options for LMK382 level transmitter

threaded mount for flange version of LMK382

Flange fitting on sensor

The LMK382 wastewater pressure transmitter technical datasheet appears to show a parallel thread that screws into a flange with a tapped hole and a back-nut to lock the sensor in place. Please could you clarify if this is how the two parts are joined together?

Please see the sketches below which show how the sensor is mounted onto the flange, it seals on the front O ring, and the fixed back-nut is for tightening the sensor onto the flange.

how LMK382 wastewater pressure trtansmitter seals on flange


LMK382 wasterwater pressure transmitter and flange


Diesel compatibility

The LMK382 low range submersible level sensor product page suggests that the sensor is for installing in water, so I was wondering whether it will need any additional certification to operate in diesel and will it affect the service life of the sensor?

Additional certification is only required if the area that it is being installed is classified as a hazardous area (potentially explosive). The normal service life will not be affected by immersion in Diesel.

Grubby rain water

Can the LMK382 be used with grubby rain water?

Yes, this sensor has a flush diaphragm under the nose cone so it can be installed with or without the nose cone, and easily cleaned either way if it becomes clogged.

Related Documents

Specification data sheet

Application Suggestions

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