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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 (JPY) 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: ¥16,188.1 198In Stock New At Mouser	Mfr. Part # S287/03 Mouser Part # 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	¥16,188.1 ¥15,023.7 ¥14,590.2 ¥14,070.3 View ¥13,714.9 ¥13,389.3 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: ¥10,120.5 95In Stock New At Mouser	Mfr. Part # S285/03 Mouser Part # 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	¥10,120.5 ¥9,346.4 ¥9,057.4 ¥8,711.9 View ¥8,476.1 ¥8,258.5 ¥7,932.9	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: ¥11,309.7 72In Stock New At Mouser	Mfr. Part # S285/05 Mouser Part # 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	¥11,309.7 ¥10,457.7 ¥10,138.7 ¥9,758.4 View ¥9,499.3 ¥9,258.4 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: ¥11,120.4 75In Stock New At Mouser	Mfr. Part # S285/109 Mouser Part # 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	¥11,120.4 ¥10,278.3 ¥9,966 ¥9,590.6 View ¥9,334.8 ¥9,099 Quote	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: ¥13,837.8 36In Stock New At Mouser	Mfr. Part # S285/V05 Mouser Part # 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	¥13,837.8 ¥12,821.3 ¥12,442.6 ¥11,989.1 View ¥11,680.2 ¥11,394.5 Quote	Min.: 1 Mult.: 1		S285
	Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4"NPTF, PU 1 LIQ S298/202 Amphenol Rochester Sensors 1: ¥12,377.8 262On Order New At Mouser	Mfr. Part # S298/202 Mouser Part # 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	262On Order On Order Ship Dates Mfr. #: S298/202 Stock: 0 On Order: 250 Expected 10/29/2026 12 Expected 11/2/2026 Factory Lead-Time: 10 Weeks	¥12,377.8 ¥11,455.9 ¥11,112.1 ¥10,700.2 View ¥10,419.5 ¥10,160.3 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: ¥10,120.5 90Expected 10/29/2026 New At Mouser	Mfr. Part # S285/13 Mouser Part # 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	¥10,120.5 ¥9,346.4 ¥9,057.4 ¥8,711.9 View ¥8,476.1 ¥8,258.5 ¥7,932.9	Min.: 1 Mult.: 1		S285