Liquid Level Switches

Eliminate nuisance switch tripping with a wide range of differentials
  • Large differentials are immune to wave action and turbulence (L-21VCR models)
  • Single-point switch provides pump up/pump down level control
  • Withstands corrosive and particle-contaminated working fluids
This series of liquid level switches are easy to install, operate and maintain. Through-wall NPT process fittings and NPT electrical ports facilitate integration into existing systems. Operation checks and troubleshooting require only a multimeter.


Wetted materials are fiberglass-reinforced PPS and Hastelloy® C. Switch types and materials of construction resist corrosion and increase durability, making them suitable even for seawater and filtered sewage.
$97.00 - $238.00USD / Each

6 variations of this product are available.

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6 PRODUCT OPTIONS
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Max Pressure (PSI) Min Secific Gravity
Availability Pricing
Harwil L-21VCR/15A/1/F Liquid Level Switch, 1" differential EW-34001-55 Mfr # L-21VCR/15A/1/F
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250 0.7
$208.00USD / Each
Harwil L-21VCR/15A/2/F Liquid Level Switch, 2" differential EW-34001-57 Mfr # L-21VCR/15A/2/F
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250 0.7
$210.00USD / Each
Harwil L-21VCR/15A/3/F Liquid Level Switch, 3" differential EW-34001-59 Mfr # L-21VCR/15A/3/F
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250 0.7
$210.00USD / Each
Harwil L-21VCR/15A/5/F Liquid Level Switch, 5" differential EW-34001-61 Mfr # L-21VCR/15A/5/F
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250 0.7
$208.00USD / Each
Harwil L-30CR/F Liquid Level Switch, 1/2" NPT EW-34001-63 Mfr # L-30CR/F
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75 0.8
$238.00USD / Each
Harwil L-40VCR/NO/HOR Liquid Level Switch, normally open (N.O.), horizontal mount EW-34001-65 Mfr # L-40VCR/NO/HOR
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200 0.7
$97.00USD / Each
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