• NLS Pneumatic Level Switch
  • Pipes of different length insert and remove from the switch. The switch is then placed inside a tank with yellow viscous liquid. As the liquid rises to a certain level the switch activates.

Pneumatic Level Switch


Unique Level Switch For Viscous Materials

Viscous and sticky liquids can stop a float switch in its tracks. The NLS is the answer.


Long Life
With few moving parts, only a flexing diaphragm, the NLS pneumatic point level sensor lasts long and is very reliable.

Low Power Operation
The NLS requires no power to operate it sensing elements, and provides a dry contact output.

Field Adjustable
Install a ½ in. pipe of your choosing in the bottom of the sensor housing, protruding past the switch point in the tank. The switch point is easily adjusted by your choice in pipe length.

Common Model Configurations

All common model configurations can be purchased online, click the model number link below. Refer to Model Number Configurator on the datasheet for a full list of configuration options.

Model Number Model Description
NLS-1A Standard Materials (Neoprene®); NEMA 4, IP42; Water, Oil, Wastewater

Additional model configurations are available on our online store.

Datasheets & Downloads


1 SPDT switch
Detection Range 8 to 200 in.


Output Contact Rating
250 V, 10 A AC, 115 V, 0.5 A DC (resistive)


2 conductor lead wire


Housing Cover
ADC12 or SS41
ADC12 or Phenolic
ADC12, SCS13, or Phenolic
Neoprene® or Viton®
Cable Entry
PF ¾ or Gasket 6Ø


Operating Temperature
-4 to 158° F
Enclosure Protection