L-30N Liquid Level Switches

Aug. 12, 2011

Noryl (PPO) with Optional Filter Boot

Component Recognized

For Use in Highly Particle Contaminated Liquids:

  • Sewage
  • Waste water
  • Contaminated ground water
  • Machine cutting oils
  • Medium slurries

Corrosive Liquids such as:

  • Mild acids and bases
  • Sea water
  • Rusty coolant water (see here).

Special Features

  • Particle contamination resistance is provided by a single convolute elastomeric flexible seal which is continuously flushed by the working fluid.
  • Models for vertical or horizontal mounting.
  • Maintenance and checkout is a snap for your present personnel using an uncomplicated standard test meter.
  • Optional Nitrophyl (Nitrile) Closed Cell Float for mounting switch in 1? NPT fitting.


  • Wetted surfaces Noryl (PPO), 316 stainless steel, and EPDM elastomer seal.
  • SPDT 15 amp, 120/240 VAC, switching capacity model or Gold Cross Dry Circuit Computer/PLC Interface Model.
  • Intrinsically Safe Relay allows Model L-30 to be used in hazardous areas.
  • Temperatures to 200°F continuous.
  • Pressures to 75 psig operating
  • Pressures to 100 psig non-operating.


  • High/Low Liquid level alarm
  • Liquid level indication
  • Pump Up/ Pump Down Control
  • Solenoid Valve control

Noryl test strips are available for testing in your particular chemical environment
Extensive Chemical Corrosive List Available

Both horizontal and vertical models are available with DMP cable connector or “F” model 1/2? conduit fitting.

Model L-30N (Noryl PPO)

For use in:

  • Water
  • Acids
  • Bases
  • Inorganic solutions
  • Sewage
  • Contaminated water

Wetted Surfaces

Noryl Engineering Plastic (PPO), 316 Stainless Steel, EPDM (Viton optional)

Nominal Working Temperature & Pressure

Temperature (°F): 200 Max

Pressure (psig): 75 Operating;

100 Max Non-operating

Optional filter boot available in EPDM

(Viton Special Order)


Working Fluid Spec. Gravity – 0.8 min.

Electrical Switch Characteristics

  • SPDT
  • UL and CSA listed
  • 15 AMP @ 1/2 HP; 125/250 VAC
  • 1/2 AMP @ 125 VDC, 1/4 AMP @ 250 VDC
  • 5 AMP 125 VAC (Tungsten lamp load)
  • 10,000,000 operations median.

SPDT-Dry Circuit Option

Gold Cross Bar Contacts for Computer/PLC Interface

0.1 AMP or less 5-24 VAC/DC (UL & CSA listed)

Liquid Level Change to Activate Switch

? 1/4? all models

Weight: 1/2 lb

Installation Dimensions