IACS Float Kit 5 (FK5) Stainless Steel RA Switch & 10A Relay Board


IACS Float Kit 5 is a popular choice for people wanting a reliable solution either year-round or suitable for use with hot liquids such as boiling water. Consisting of a 10 amp float switch board and a right angled stainless steel barrel switch it can be used in: water, salt water, weak acids and more.…


Product Details

For your convenience below is a data sheet containing information about size, specifications and basic wiring.

Datasheet & Instructions: IACS FK5 Datasheet

Useful customer support is also available from helpful, experienced technicians as well as many custom requests being catered for!

Product Features

Board Input Voltage OptionsWe are able to produce this board / kit in 9V, 12V, 24V.

This voltage range powers the board and does not interact with the switching ability e.g. a 12V DC board can switch anything up to 250V AC or 30V DC for this model.

Float Switch PowerThe float switch will have the same as the board’s input voltage or lower put through it but only at a low amperage of around 5-25mA making it much safer than running for example mains voltage that close to water.
Switching FormSPDT – NO, COM, NC
Switching Power (Amps)Up to 10 amps continuous (10A) at 250V AC, OR 30V DC
Switch Response Time (ms)Usually less than 20ms – most tests show around 8ms.
General FeaturesInput polarity protection, Flywheel, resistive logic, high quality, polarity LED and signal LED to indicate float state and power state. Only a very low voltage goes through the float switch – usually less than 5 volts DC. Mains voltage is always isolated from the float switch or sensor.
Compatible withSelf standing but may be interfaced with Arduino, ARM, AVR, MCU, PIC, Motherboard, optical controller, our USB / Serial 32 channel controllers, Raspberry Pi, 8051, TTL, CMOS, Parallel ports and more
Special FeaturesNo special features other than those listed in general features above.


Suggested UsesAlarm, lighting, security system, Arduino, Raspberry Pi, sensor switch, fan control, heating, general home automation, emergency pump, aquaponics, fish tank sump, flood prevention, automatic watering systems,

(L x W x H)

7cm + screw terminal overhangs board by around +5mm so (7.5cm) x 5cm x 2.6cm plus terminal block overhang approx 12mm clearance recommended
PCB TypeIndustrial Grade FR-4, does not flex or corrode
Surface TreatmentsLead-Free HASL (RoHS) or ‘ENIG’ for special batches, treated with a protective silicone based coating to resist / reduce moisture inhibition and/or corrosion
Place of ManufactureENGLAND (Hand assembled and quality tested on site)
Quality ControlCE, EMC, IEC 6100-6-1, 6100-6-3, RoHS, WEEE (Compliance Number WEE/FK 2902 UZ), IMS115
Safety NoticesTake care when working with high voltages, isolate before touching the unit, the board must be kept dry and should be mounted inside waterproof housing such as an IP rated enclosure with wires sealed. We may have some enclosures available in our store but if not, they can be sourced easily. A qualified person should work with high voltages such as mains voltage.
VAT Invoices

(20%) Value Added Tax

UK VAT is already included in the sale price @ 20 %.We provide VAT invoices to our UK / EU customers as standard (in the package)
QuantityThis listing is for 1 unit unless otherwise stated, the pictures are a true representation of the quality but more than one item may be shown in the picture for multiple angles. Some colours may vary e.g. some voltage variants may have different relay casing. This is illustrative only.
Datasheet LocationIACS FK5 Datasheet
Manufacturer’s Websiteiacselectronics.com
CustomisableYes e.g. we can leave the LEDs off if needed or extend the cable on the float switch
Product ClassificationOn-going production availability.

Additional information

DC Supply Voltage

5V DC, 6V DC, 9V DC, 12V DC, 18V DC, 24V DC, 36V DC, 48V DC

Float Switch Cable Length

Standard – As it comes (Approx 30cm), Extend to 1 Metre Approx, Extend to 2 Metres Approx


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