Liquid Level Sensors

Liquid Level Sensor Products

Gems liquid level sensors and switches provide high-reliability monitoring and detection of a wide range of fluid media. Requirements can range anywhere from the sensing of cooking oil, to hydraulic fluids, to diesel fuel tanks, to water and wastewater, to biohazards, to even deionized or potable water.

To effectively address such a wide variety of measurement challenges, Gems offers a broad range of contact, non-contact, and non-intrusive liquid level switches and sensors. These are available in multiple technology types, including reed switch-based floats, solid-state electro-optical, conductivity, capacitive, ultrasonic, and piezo-resonant. Multiple liquid level sensing technologies may also be incorporated within a single application. Sometimes, more than one “best fit” solution may also exist, with the ultimate decision simply a matter of customer preference.

Standard catalog products for liquid level sensing include single point level switches, continuous level transmitters, multi-point level switches, and visual level indicators. Detailed specifications on these and other liquid level sensors and switches may be found in the links below.

Please consult our fully digital online standard product catalog for an up-to-date listing of available models for immediate customer shipment.

Single Point Level Sensors

Multi-Point Level Switches

Continuous Level Transmitters

Visual Level Indicators & Tank Level Gauges

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Sensor Technology Comparison

Categories	Attributes	Float Type		Capacitive	Electro-Optic	Ultrasonic	ULS-200
Categories	Attributes	Single-Point	Multi-Point	Capacitive	Electro-Optic	Ultrasonic	ULS-200
Solid-State
Housing Material	Metal
Housing Material	Plastics
Medias Detected	Water
	Coolant
	Engine Oil
	Hydraulics
	Diesel Fuel
	Brake Fluid
	Power Steering Fluid
	Transmission Fluids
Key Attributes	Dry Contact Output
	Open Collector, Sinking/Sourcing
	Resistant to Coating
	Range of Construction Materials
	High Ingress Protection
	Ignores Condensation
Sensor footprint	Small
	Medium
	Large
Mounting Orientation	Side, Threaded
	Top, Threaded
	Top, Flange
Electrical		SPST or SPDT 10-100 VA	SPST or SPDT 10-100 VA	3-Wire, 9-32 VDC	3-Wire, 5-28 VDC	3-Wire, 5-28 VDC	3-Wire, 9-32 VDC

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Featured

Articles

How Does an Open Collector Output Work?

An open collector output is a solid state switching circuit used with many Gems level sensors. The open collector works with DC power and basically toggles the current flow from the output signal wire to ground.

Harvester Applications for Gems ULS Level Sensor

Harvester & Combine Equipment Using ULS-200 Solid-State Level Sensors

Harvester and Combine equipment manufacturers require feedback on the status of all the fluid level containers and reservoir tanks on their vehicles.

How the XM/XT-700 Level Sensor is used in Spray Tan Booths

Spray tans are an alternative to traditional tans achieved from laying out in the sun, which run the risk of damaging your skin through harmful UV exposure.

Fire Truck: Power Steering with XLS-1

Modern fire trucks are full of numerous controls and fluid sensors: water level, water pressure, water flow rate, tire pressure monitoring, vehicle grade, slope indication, etc.

Ultrasonic Continuous Level Transmitter Accuracy

Gems UCL (Ultrasonic Continuous Level) series, which includes the UCL-510 and UCL-520, both provide a linear output signal of 4-20 mA scaled to match a level measurement value.

Sinking or Sourcing: General Overview

Sinking and Sourcing are terms used to describe how an associated load (the device being turned on or off by the sensor) is powered in relation to the sensor.

How to Calculate Radar Beam Width

Radar technology works by sending out short microwave signals toward the liquid via the sensor. The microwave signal then hits the liquid surface and bounces back toward the sensor.

4-20 mA Two-Wire Current Loop Basics

Many Gems sensor products offer a linear 4-20 milliamp (mA) output signal for transmitting to a receiver (meter/display, PLC, etc.) when measuring level or pressure.

UCL-510 Software Installation Troubleshooting Guide

If you are receiving error messages during the installation of the UCL-510 software, we have found that the steps below will correct the error

Visual Tank Level Monitoring for Food and Beverage Reagents

Commercial food product processing facilities will take raw food product such as peanuts or other grain and refine it into a usable baking product such as dough.

Ensuring Coolant Levels in Buses

As a city bus is making it’s rounds through the city, there are numerous functions that are all running simultaneously to keep the bus on time, to keep the passengers on time and to ensure all runs smoothly with no interruptions.

LS-7 Series, Side Mounted Level Switches in Food Warmers

If you are looking for a dependable and cost-effective side mounted level switch that your customers can count on, look no further. The LS-7 Series sensor is the perfect solution!

Introducing the Segmented Coaxial Radar Level Sensor

Introducing an addition to the Radar family: Segmented Coaxial Radar units greater than 1 meter.

1" NPT Now Available for LS, XM & XT 800

Gems Sensors has expanded the mounting options for LS, XM and XT 800 units to now include a 1" NPT.

CAP-3: Competitive Pricing For Large Volume

The new CAP-3 is a capacitive sensor for OEMs that offers highly competitive pricing for large volume applications.

Reintroducing the Mini Transmitter

Gems Sensors reintroduces the line of mini continuous level transmitters for small tank applications- the XM-XT 300 and XM-XT 700.

RLI-G – Ready to Serve Your Most Demanding Tank Level Applications!

The RLI-G Guided Wave Radar is a no-moving parts continuous level sensor with advanced radar level sensing technology for reliable performance in the most challenging marine and industrial tank level applications.

Medical Sensor Technology for Medical Imaging & Lasers

Gems Sensors products have been used in the medical technology industry for over 20 years for a wide range of medical equipment. Here are some of the applications that our medical sensor technology has been used in by our customers.

How Ultrasonic Sensors Can Be Used in Mining Equipment

In mining, mineral and metal processing technology is essential. This technology separates the valuable minerals from waste which is usually done so using magnets.

Popular Reed Switch Level Sensing Products

Reed switches are by no means new technology, but they are still commonly used today as a “tried and true” way to determine liquid level. Reed switches are very durable which ensures long, trouble-free service that is also very economical.

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