Product category:
Pressure sensors
News Release from: SensorsOne | Subject: LMK 809 submersible plastic level transmitter
Edited by the Engineeringtalk Editorial
Team on 02 February 2007
Level transmitter resists corrosion
SensorsOne's LMK 809 submersible plastic level transmitter measures low pressure level ranges and resists corrosion.
Some fluids will corrode stainless steel over time and although the erosion of material is often only millimetres per year, this is significant when considering the thickness of pressure sensor diaphragms which can vary between a few thousandths of an inch to 2mm In these types of applications ceramic sensor elements offer excellent corrosion resistance to the most aggressive media such as acid or alkaline liquids
This article was originally published on Engineeringtalk on 24 May 2006 at 8.00am (UK)
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If you need to measure the level of a highly corrosive chemical it maybe necessary to eliminate stainless steel wetted parts entirely by constructing the sensor housing out of plastic.
To ensure a long lasting seal between the ceramic sensor element and the plastic moulding an O-ring must also be made from a compatible material such as EPDM.
If it is not possible to fit liquid level sensors to the outside of chemical storage tanks then you may have to consider using a submersible plastic pressure transmitter.
The cable will also need to be resistance to corrosive chemicals as well and cable jackets made from PVC, PTFE or FEP will need to be specified to avoid long-term cable deterioration.
The LMK 809 submersible plastic level transmitter measures low pressure level ranges from 1.6 to 4m of water gauge and has a ceramic pressure sensor element which is ideal for use with corrosive liquids.
Depending on the chemical compatibility required the hydrostatic pressure transmitter can have a PVC or PVDF sensor housing which both offer excellent compatibility for a wide range of corrosive fluids.
Any length of PVC, PUR or FEP jacketed cable can be fitted onto the LMK-809 plastic level sensor to provide chemically resistant, IP68-rated electrical wiring.
Depending on the temperatures and corrosion protection required FKM, EPDM or FFKM O-rings can be selected for the liquid pressure-tight seals used in the LMK809 pressure sensor's construction.
The electrical output of the LMK 809 chemical level transmitter is a 4-20mA signal which is accurate to +/-0.25% full scale at room temperature including linearity, hysteresis and repeatability.
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