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The LLHP range of liquid level switches offer larger mounting threads and robust stainless steel housings that can survive in aggressive environments.

The microcontroller based sensor is solid state, incorporating 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. It is insensitive to ambient light and is not affected by foam when in air or by small bubbles when in liquid.

A range of N and P type output configurations can sink or source up to 100mA at a supply voltage range from 4.5 to 15.4 Vdc or 800mA at a supply voltage range from 10 to 45Vdc, all of which can be configured to output a high or low signal in either a wet or dry state.

The LLHP range of liquid level switches combine a robust stainless steel housing with a chemically resistant Polysulfone or Trogamid sensing tip and a selection of termination options. With large threads suitable for external mounting and for use in two operating temperature ranges; Standard (-25 to 80°C) or Extended (-40 to 125°C).

TECHNICAL SPECIFICATIONS
Supply Voltage (Vs) 4.5VDC to 15.4VDC (±5%)
10VDC to 45VDC (±5%)
Supply Current (ls) 15mA max. (Vs = 12VDC)
35mA max. (Vs = 45VDC)
Output Sink and Source Current (lout) 100mA max. (15.4VDC)
800mA max. (45VDC)
Operating Temperatures Standard: -25°C to +80°C
Extended: -40°C to +125°C
Storage Temperatures Standard: -30°C to +85°C
Extended: -40°C to +125°C
Housing Material Stainless Steel with Polysulfone tip
Sensor Termination Refer to datasheet

OUTPUT VALUES
Output Voltage (Vout): lout = 100mA
Vs = 4.5 – 15.4VDC
Output High Vout = Vs – 1.5V max
Output Low Vout = 0V +0.5V max

Output Voltage (Vout): lout = 800mA
Vs = 10 – 45VDC
Output High Vout = Vs – 1.8V max
Output Low Vout = 0V + 0.7V max