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POS Glass Tip Range of Liquid Level Switches - POS187/POS287

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• Supply voltage: 12V DC to 28V DC
• Supply current: 25mA max.
• Output sink and source current: 200mA max.
• Operating temperatures
POS187: -25°C to +100°C
POS287: -40°C to +140°C

Model Number: POS187/POS287
Data Sheet:

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Product Specification

POS Glass Tip Range of Liquid Level Switches General Description
The POS Glass Tip range of liquid level switches are robust and rugged, ideal for operation in harsh industrial environments, aggressive chemicals and extreme temperatures up to 140°C.

The POS Glass Tip sensor is solid state, combining an infra-red LED and phototransistor which are optically coupled by the tip when the sensor is in air. When the sensing tip is immersed in liquid, the infra-red light escapes making the output change state. The sensor can detect the presence or absence of almost any liquid type, oil or water based.

Options of N and P type outputs can sink or source up to 200mA at a supply voltage range from 12 to 28Vdc and can be configured to be a high or low signal in either a wet or dry state. The sensor is available with a M12 connector or 3 core cable and also has LED output indication.

The stainless steel body combined with a crystal glass sensing tip allows these sensors to operate under high pressure conditions up to 80 bar and across two temperature ranges; Standard (-40 to 100°C) or Extended (-40 to 140ºC).

POS Glass Tip Range of Liquid Level Switches Features
• Liquid level switches that can detect almost any liquid type; oil or water based
• Suitable for harsh environments; robust Stainless Steel housing and crystal glass tip
• Choice of terminal connections

POS Glass Tip Range of Liquid Level Switches Benefits
• Suitable for use within aggressive environments
• Extreme temperatures
• LED output indication

POS Glass Tip Range of Liquid Level Switches Technical Specifications

Supply voltage (Vs)	12V DC to 28V DC
Supply current (ls)	25mA max.
Output sink and source current (lout)	200mA max.
Operating temperatures	POS187: -25°C to +100°C
Operating temperatures	POS287: -40°C to +140°C
Storage temperatures	POS187: -25°C to +100°C
Storage temperatures	POS287: -40°C to +140°C
Housing material	Stainless Steel with Simax crystal glass tip
Sensor termination	M12 Brad Harrison connector or PUR 3x0.25mm, 2m cable

POS Glass Tip Range of Liquid Level Switches Output Values

Output Voltage (Vout):	lout = 200mA
Vs = 12 ~ 28V DC
Output High	Vout = Vs - 1.5V max
Output Low	Vout = 0V + 0.5V max

POS Glass Tip Range of Liquid Level Switches Outline Drawing
All dimensions shown in mm. Tolerances = ±1mm

POS Glass Tip Range of Liquid Level Switches Order Information
Generate your specific part number using the convention shown below. Use only those letters and numbers that correspond to the sensor and output options you require — omit those you do not.