Optical Liquid-Level Switches

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1 1/16"

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4 Products

Noncontact Level Sensor Switches for Water

Detect water level with infrared light to avoid false switch activation caused by vibration in your tank. Also known as optical switches, these sense the level by reflecting light into a receiver that sends an output current to activate an alarm or control circuit. They are sensitive to light and should be shielded or used in enclosed tanks. Mount them horizontally or vertically.

SPST-NC—SPST-NC switches activate when the tip is exposed to air and light reflects into the receiver.

SPST-NO—SPST-NO switches activate when the tip is submerged in liquid and light stops reflecting into the receiver.

	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Output Current, mA	Overall Lg.	Hex Size	Electrical Connection		Each
10V DC to 28V DC Input Voltage







	Polysulfone Body

	1/4	NPT	Male	150 psi @ 70° F	0 to 175	1/4"	1 Off	SPST-NO	40	2 3/16"	5/8"	Wire Leads	46455K48	0000000


	1/4	NPT	Male	150 psi @ 70° F	0 to 175	1/4"	1 On	SPST-NC	40	2 3/16"	5/8"	Wire Leads	46455K38	000000

Infrared Noncontact Level Sensor Switches for Chemicals

Detect chemical level with infrared light to avoid false switch activation caused by vibration in your tank. Also known as optical switches, these sense the level by reflecting light into a receiver that sends an output current to activate an alarm or control circuit. They are sensitive to light and should be shielded or used in enclosed tanks. Mount them horizontally or vertically.

SPST-NC—SPST-NC switches activate when the tip is exposed to air and light reflects into the receiver.

SPST-NO—SPST-NO switches activate when the tip is submerged in liquid and light stops reflecting into the receiver.

	Max. Pressure @ Temp.	Temp. Range, ° F	Insertion Dp.	Switch Starting Position	Switch Designation	Output Current, mA	Overall Lg.	Hex Size	Electrical Connection		Each
10V DC to 40V DC Input Voltage







	Polysulfone Body

	3/8	BSPP	Male	145 psi @ 70° F	0 to 175	1 3/4"	1 Off	SPST-NO	200	3"	1 1/16"	Wire Leads	4949K35	0000000


	3/8	BSPP	Male	145 psi @ 70° F	0 to 175	1 3/4"	1 On	SPST-NC	200	3"	1 1/16"	Wire Leads	4949K33	000000