Level Sensors & Switches

ULS-100 Universal Level Sensor

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The versatile Universal Level Sensor is a solution for OEM applications. The sensor is compact, tolerates coating, and is rugged enough for mobile equipment in agricultural, construction, buses as well as power generation, semiconductor and HVAC applications.

CE ROHS Gems Compliant CSA


  •  IPX7 & IP6K9K
  • RoHS - CE
  • Solid-state Output
  • Sinking or Sourcing
  • Wet or Dry signal
  • Resists Coating & build-up
  • Water -Oil - Hydrocarbon Based Liquids
  • High Process Pressure to 300 PSIG
Sensor Type
Primary Material Of Construction
316L Stainless Steel 
Wetted Materials
O-Ring - Buna-N, Probe Tip - PBT/PC Blend   
Stem Material
Maximum Pressure
300 psig (20.7 Bar) 
Minimum Temperature
-40°F (-40°C)   
Maximum Temperature
185°F (85°C) 
Mounting Size
1/2-14 NPT 
Mounting Style
 Almost Any
Electrical Termination
Solid-state, Wet or Dry, Sinking or Sourcing Output, 9-32 VDC, 30mA max

ULS-100 Legacy Products Cross-Over

Format .pdf
Size 397 KB

Universal Level, ULS-100 Specification Sheet

Format .pdf
Size 317 KB

Universal Level Sensor Product Technology Comparison

Format .pdf
Size 213 KB

ULS-100 Product Guide

Format .pdf
Size 1 MB

Gems Sensors & Controls ULS-100 Level Sensor Data Sheet

Format .pdf
Size 722 KB
  • Aerospace - Defense
  • Aerospace - Environmental Control Unit
  • Food & Beverage - Beverage dispensing
  • Food & Beverage - Brewery
  • Food & Beverage - Brewing Equipment
  • Food & Beverage - Food Service Equipment
  • Food & Beverage - Fryers
  • Food & Beverage - Other
  • Food & Beverage - Ovens
  • Food & Beverage - Steam Cookers
  • Food & Beverage - Systems Integrator- OEM- both
  • Food & Beverage - Washers
  • General Industry - Appliance
  • General Industry - Car Wash Equipment
  • General Industry - Chemical Metering/Injection
  • General Industry - Cleaning Equipment
  • General Industry - Compressors
  • General Industry - Elevators
  • General Industry - Fountains
  • General Industry - Hydraulics
  • General Industry - Laser Equipment
  • General Industry - Machine Tool
  • General Industry - Machinery
  • General Industry - Motors
  • General Industry - Other
  • General Industry - Plasma Cutting
  • General Industry - Plastics & Packaging
  • General Industry - Printing - 3D
  • General Industry - Printing Equipment
  • General Industry - Purifiers
  • General Industry - Skid Manufacturer
  • General Industry - Tanks
  • General Industry - Tanks - Specialty Chem
  • General Industry - Test & Measurement
  • General Industry - Welders
  • HVAC/R - Cooling
  • HVAC/R - Cooling Towers
  • HVAC/R - Evaporators
  • HVAC/R - General HVAC
  • HVAC/R - Heating/Condensate Systems
  • HVAC/R - Humidifers
  • HVAC/R - Other
  • HVAC/R - Refrigeration
  • HVAC/R - Warmers
  • HVAC/R - Warrick
  • Marine - Commercial - Ship Systems
  • Marine - Commercial - Shipbuilder
  • Marine - Commercial - Workboats
  • Medical - Analytical Instruments
  • Medical - Cooling
  • Medical - Imaging
  • Medical - Immunochemistry
  • Medical - IVD
  • Medical - Lab
  • Medical - Laboratory & Testing
  • Medical - Life Sciences
  • Medical - Medical Lasers
  • Medical - Other
  • Medical - Radiology
  • Medical - Renal Care / Dialysis
  • Medical - Sterilization
  • Medical - Washers
  • OHV - Agricultural Equipment
  • OHV - Construction Equipment
  • OHV - Fertilizer
  • OHV - Fire Trucks
  • OHV - Forestry Equipment
  • OHV - Highway Construction Equipment
  • OHV - Industrial Equipment
  • OHV - Lawn Equipment
  • OHV - Material Handling
  • OHV - Military Vehicles
  • OHV - Mining Equipment
  • OHV - Other
  • OHV - Recreational Vehicles
  • OHV - Refueling Trucks
  • OHV - Specialty Equipment
  • OHV - Street Sweepers
  • Power Generation - Fuel Cell
  • Power Generation - Generators
  • Power Generation - Green Energy
  • Power Generation - Other
  • Power Generation - Turbines
  • Power Generation - Wind-Motor
  • Process Industry - Chemical
  • Process Industry - Other
  • Process Industry - Process Tanks
  • Process Industry - Pulp & Paper
  • Process Industry - Textiles
  • Semicon Equipment
  • Semiconductor- Cooling
  • Transportation - Buses
  • Transportation - Commercial On-Road Vehicles
  • Transportation - Engine Performance
  • Transportation - Fire Trucks
  • Transportation - Fuel - Level Monitoring
  • Transportation - Other
  • Transportation - Specialty Vehicles
  • Transportation - Test & Measurement
  • Water & Waste Water - Chemical Metering/Injection
  • Water & Waste Water - Other
  • Water & Waste Water - Point of Use
  • Water & Waste Water - Pumps
What liquids can the Universal Level Sensor detect?

The Universal Level Sensor can sense aqueous, oil, and hydrocarbon liquids.

How is the Universal Level Sensor affected by coolant coating the sensor element?

The PBT/PC blend sensing element designed to resist coating and build-up due to the smooth surface material and flush sensing face.

Will foam or bubbles affect the Universal Level Sensor?

The Universal Level Sensor will only sense bubbles or foam when it is dense enough to trigger the sensor (usually right at liquid surface). Light bubbles and foam further from the surface will be sensed as air and will not cause false signals.

How does the Universal Level Sensor handle sloshing or turbulence?

The Universal Level Sensor can be configured with a time delay on increasing level, decreasing level, or both. The sensor will not trigger as liquid present or as dry condition until after the configured delay has lapsed.

How is the Universal Level Sensor better than my float level switch?

The float type level switches are susceptible to build-up and mechanical failure over time due to having moving parts. The switching is usually done with an internal reed switch. This is also at risk of failure from normal wear and electrical damage. The Universal Level Sensor uses reliable solid state (no moving parts) electronic switching with an open collector.

What is an open collector output?

The open collector is an electronic solid state switch with no moving parts. It works with DC power and basically toggles the current flow from the output signal wire to ground. It has a base, a collector, and an emitter. The sensor signal is always the base leg, and current is either allowed or blocked from collector to emitter with the presence of liquid (depending on the configuration).

Can the Universal Level Sensor trigger a signal in either wet or dry condition?

The Universal Level Sensor can be configured in the factory to signal when the sensor element is wet or dry with optional time delays and either a sinking or sourcing circuit.

How do I choose between sinking or sourcing?

It all depends on how you wish to wire the sensing circuit. In a sinking configuration, current passes through the load first, through the output switch of the sensor second and lastly to ground. It is a transistor logic output that switches the DC ground, or negative, leg of the circuit. In a sourcing configuration, the load must be connected between the sensor output and the DC ground. With a sourcing sensor, your input voltage powers the load. It is a transistor logic output that switches the DC positive voltage. A sensor with a sourcing output switches the positive leg of the circuit.

Is the Universal Level Sensor suitable for outdoor use?

With its rugged durable stainless steel construction, glass reinforced PBT/PC blend sensing element, IPX7 & IP6K9K rating (direct-spray, wash-down), and wide temperature range, the Universal Level Sensor was designed to withstand the harshest outdoor environments.

I have limited space. Will the Universal Level Sensor work for me?

The Universal Level Sensor’s compact design consisting of a less-intrusive flush sensing element, and less than 3” overall length fits in the smallest footprint making it great for mobile applications.

I use float-type, electro-optic, and ultrasonic sensors on my equipment. Which sensors can the Universal Level Sensor replace?

Gems’ Universal Level Sensor encapsulates the best of what existing sensor types offer in a single sensor technology. It was designed to work with a wide variety of medias. It eliminates failure caused by moving parts. It works well in high viscous, high pressure, humid, and reflective applications. It does not rely on specific gravity and resists coating and build-up. Simplifying product selection and reducing inventory with ONE common sensor type to replace them all!