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S28x Capacitance Coolant Level Switches

Amphenol Rochester Sensors S28x Capacitance Coolant Level Switches are active devices designed to give an alarm signal if liquid falls below or rises above a preset level. These can be specified with a delay to eliminate false alarms due to turbulence. Containing a factory-programmable microprocessor, the switches offer sink-to-ground, source-voltage, or both outputs on separate pins.

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Select	Image	Part #	Mfr.	Description	Datasheet	Availability	Pricing (CHF) Filter the results in the table by unit price based on your quantity.	Qty.	RoHS	Series
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SI 10 FA, SI AIR, DE3 S287/03 Amphenol Rochester Sensors 1: CHF 78.46 198In Stock New At Mouser	Mfr. Part No. S287/03 Mouser Part No 34-S287-03 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SI 10 FA, SI AIR, DE3 Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	198In Stock	CHF 78.46 CHF 72.81 CHF 70.71 CHF 68.19 View CHF 66.47 CHF 64.88 Quote	Min.: 1 Mult.: 1		S286
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SI 10 FA, SI AIR S285/03 Amphenol Rochester Sensors 1: CHF 49.05 95In Stock New At Mouser	Mfr. Part No. S285/03 Mouser Part No 34-S285-03 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SI 10 FA, SI AIR Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	95In Stock	CHF 49.05 CHF 45.29 CHF 43.90 CHF 42.22 View CHF 41.08 CHF 40.02 CHF 38.44	Min.: 1 Mult.: 1		S285
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SI 10 FA, SI AIR S285/05 Amphenol Rochester Sensors 1: CHF 54.81 72In Stock New At Mouser	Mfr. Part No. S285/05 Mouser Part No 34-S285-05 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SI 10 FA, SI AIR Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	72In Stock	CHF 54.81 CHF 50.68 CHF 49.13 CHF 47.30 View CHF 46.03 CHF 44.87 CHF 43.96 Quote	Min.: 1 Mult.: 1		S285
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SS 0 FA, SI LIQ, SO AIR S285/109 Amphenol Rochester Sensors 1: CHF 53.89 75In Stock New At Mouser	Mfr. Part No. S285/109 Mouser Part No 34-S285-109 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SS 0 FA, SI LIQ, SO AIR Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	75In Stock	CHF 53.89 CHF 49.81 CHF 48.30 CHF 46.48 View CHF 45.24 CHF 44.09 CHF 42.65	Min.: 1 Mult.: 1		S285
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SS 10 FA, SI LIQ, SO AIR S285/V05 Amphenol Rochester Sensors 1: CHF 67.06 36In Stock New At Mouser	Mfr. Part No. S285/V05 Mouser Part No 34-S285-V05 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SS 10 FA, SI LIQ, SO AIR Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	36In Stock	CHF 67.06 CHF 62.13 CHF 60.30 CHF 58.10 View CHF 56.61 CHF 55.22 Quote	Min.: 1 Mult.: 1		S285
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4"NPTF, PU 1 LIQ S298/202 Amphenol Rochester Sensors 1: CHF 59.99 2In Stock 250Expected 10/29/2026 New At Mouser	Mfr. Part No. S298/202 Mouser Part No 34-S298-202 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4"NPTF, PU 1 LIQ Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	2In Stock 250Expected 10/29/2026	CHF 59.99 CHF 55.51 CHF 53.85 CHF 51.85 View CHF 50.50 CHF 49.24 Quote	Min.: 1 Mult.: 1		S298
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SI 10 FA, SI LIQ S285/13 Amphenol Rochester Sensors 1: CHF 49.05 90Expected 10/29/2026 New At Mouser	Mfr. Part No. S285/13 Mouser Part No 34-S285-13 New At Mouser	Amphenol Rochester Sensors	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SI 10 FA, SI LIQ Learn More about Amphenol Rochester Sensors amphenol s28x capacitance coolant level switches	Datasheet	90Expected 10/29/2026	CHF 49.05 CHF 45.29 CHF 43.90 CHF 42.22 View CHF 41.08 CHF 40.02 CHF 38.44	Min.: 1 Mult.: 1		S285