Teragon's LS2 Liquid Nitrogen Sensor

LS2 Liquid Nitrogen Sensor

The Teragon LS2 Liquid Nitrogen Sensor is a low cost means of determining the presence of liquid nitrogen. The sensor provides a digital output which indicates whether the end of the probe is submerged. Based on Teragon's proprietary Teristor sensor technology, the LS2 provides a unique combination of high sensitivity, fast response, and low voltage operation. The sensor can be powered from as little as 5 VDC. The LS2 is designed to work at atmospheric pressure and its applications include cryogenic dip sticks, level controllers, level alarms, and level monitoring in dewars and cold traps. A few suggested applications are shown at the bottom of this page.

LS2 pinout

The LS2 Pin Configuration

The pin configuration of the sensor is shown in the figure above. During operation, the LS2's open-collector output (SIG) is grounded when the end of the sensor is submerged in LN₂. In this low state, the output can sink up to 25 mA. The output returns to the open state when the sensor is no longer submerged. Its low power consumption permits battery-powered and portable applications. An integral splash guard inhibits premature triggering in applications involving turbulence. Each LS2 sensor is provided with a solderable connector that mates with the LS2 pins.

The LS2's features include:

	Low cost
	Low voltage operation (5-15 VDC)
	Low power consumption (0.1 W @ 5 V)
	Fast response
	Integral splash guard
	TTL/CMOS compatible output
	Made in the USA

Placing Orders

Please specify the desired sensor length: sensors are available in lengths of 1, 2, 3 and 4 feet. The length is measured from the end of the LN₂ sensor to the base of the head.

U.S. Pricing

For sensor lengths up to 4 feet: $185
Price is FOB San Francisco and is subject to change.

Download the LS2 User Guide

LS2 User Guide (135 KB)

LS2 Applications

Typical LS2 Applications

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Teragon Research
2518 26th Avenue
San Francisco, CA 94116

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