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 (CAD) Filter the results in the table by unit price based on your quantity. Qty. RoHS Series
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SI 10 FA, SI AIR, DE3 198In Stock
$140.34
$130.25
$126.49
$121.98
Min.: 1
Mult.: 1
S286
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SI 10 FA, SI AIR 72In Stock
$98.05
$90.66
$87.90
$84.60
Min.: 1
Mult.: 1
S285
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SS 0 FA, SI LIQ, SO AIR 75In Stock
$96.41
$89.11
$86.40
$83.15
Min.: 1
Mult.: 1
S285
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/2" NPTF, PU 1 LIQ, SS 10 FA, SI LIQ, SO AIR 36In Stock
$119.97
$111.15
$107.87
$103.94
Min.: 1
Mult.: 1
S285
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SI 10 FA, SI AIR 10In Stock
100Expected 2026-10-09
$87.74
$81.03
$78.52
$75.53
Min.: 1
Mult.: 1
S285
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4"NPTF, PU 1 LIQ
373On Order
$107.31
$99.32
$96.34
$92.76
Min.: 1
Mult.: 1
S298
Amphenol Rochester Sensors Level Sensors - Industrial COOLANT LEVEL SWITCH, 1/4" NPTF, PU 1 LIQ, SI 10 FA, SI LIQ
100Expected 2026-10-29
$87.74
$81.03
$78.52
$75.53
Min.: 1
Mult.: 1
S285