Consent Preferences

S285 - Capacitance Type Coolant Level Switch

Coolant Level Switch providing sink and/or source output. Fitted with integrated Delphi Metri-pack 150 series 4 pin connector.

TheS285is an active device designed to give an alarm signal if liquid falls below, or rises above, a preset level. It can be specified with a delay to eliminate false alarms due to turbulence.Containing a factory programmable microprocessor, the switch offers sink to ground or source voltage output.

Its small footprint with limited intrusion into the tank means a reduced risk of damage and a wide range of customer specifiable options make it suitable for most applications.The switch is designed to operate in both earthed metal and isolated plastic tanks. For high accuracy the S285 is ideally mounted horizontally at the point where an alarm or control signal is required. However, the switch can be mounted vertically –contact Fozmula with your application requirements.

Data Sheet
Troubleshooting Guide

Liquid types

Water based liquids,such as coolant or washer fluid,compatible with brass, PTFE, EPDMand FVMQ.

Electrical rating

Supply voltage: 9-36VDC.
Supply current: 7mA + source output.
Max. load current: 1.0A (sink) or 20mA (source).
Alarm delay time: 0 to 25s rising or falling(factory set).
Connection: 4 way Delphi Packard Metri-Pack 150 series connector.
Power up delay: 0to 10 s(factory set).
Power up state: ‘In Liquid’ or ‘Out of Liquid'(factory set).
Output type:Sink (open collector) and/or Source (supplyvoltage).
Output pin: Pin D (sink) or Pin A (source).
Output state: Sink Open / Closed in liquid (factory set).Source On / Off in liquid (factory set).

Environmental Ratings

Ingress: IP67(with mating connector fitted).
Max. pressure: 5.0 Bar (72 psi)
Temp. range: -40°C to +125°C
Weight: 70g typical (dependent on thread size)
EMC: ISO13766:2006


Body: Brass.
Probe: PTFE.
Terminals: Brass, Tin Plated
Seals: EPDM & FVMQ.
Connector: PA66 30% Glass Filled Nylon.
Thread sealant: Vibra-Seal 516 (taper thread variants only).
Vibration (15.3Grms): 3 orthogonal planes for 3 hours per planeTemp. range:-40°C to +125°C
Testing performed in accordance with BSEN 60068-2-64:1993
Drop: 1 m to concrete surface.

Optional accessoriesC/K1

Packard Metri-Pack 150 series mating connector kit to suit harness wire cross sectional area of 0.8 to 1.0mm2and sleeve Ø1.60 to 2.15mm.


See diagram below.

Product Inquiry - S285