1/2 BSP Plastic Vertical Horizontal Water Flow Switch Sensor UK Seller UK Stock


19 in stock

AC 220V 3A 1/2 BSP Plastic Vertical Horizontal Magnetic Water Flow Switch w/Sensor



Installation Mode:Vertical Or Horizontal(With the symbols of the direction of flow on item)
No standby power requirement
Simple installation and adjustment
Self-Clean Function
Pipe diameter:1/2 BSP
Contact Form:A
Contacts close on flow
Max Contact Rating: 10W
Max Switching Voltage: 100V
Max Breakdown Voltage: 220 VDC

Max switching current: 0.5A
Max carry current: 1A


This product contains a Sub-Miniture reed switch, which are very reliable
BUT if the voltage or current ratings are exceeded the reed contacts
WILL fuse together this WILL permanently damage the unit.

Remember current produces the heat and voltage pushes the current. Power = Current x Voltage

*** The product will not be replaced if the reed contacts are fused together. ***

If you are going to run a pump or high current device this should be done
using a separate appropriately rated relay and use this flow switch to
turn on the coil of the relay still observing the voltage / current and
use a diode for back EMF protection.

If you are unsure about your switching current and your running current – Please do not purchase.

Every flow switch is load tested before shipping.

 I am making the above statement as some buyers have damaged the unit due to improper use.

DO NOT EXCEED VOLTAGE AND CURRENT, OTHERWISE YOU WILL DAMAGE THE INTERNAL REED SWITCH. I have tested this item at 100v DC with a load of 1A and works fine but exceeding these paramters WILL damage the reed switch. If this happens you will void the warranty.

This item will be fully tested prior to despatch. Buy with confidence. 

Important Note Before you decide to Buy: This item is provided with NO instructions or data sheets. We are unable to provide any technical support, it is therefore essential that you have the resources available to make use of this item and how it operates within the electrical specifications. We check and test each item, we are therefore unable to accept any returns based on a faulty module.

This item will be fully tested prior to despatch. Buy with confidence.

Please read and note the following before ordering:

1) My Shipping is for UK Mainland ONLY. No Scotish Highland, Northern Ireland, Isle of Wight or other Isles. Some areas may incur additional costs, if you are unsure please contact me prior to ordering.
2) Please ensure you have a valid contact phone number, I may pass this number onto the Carrier for delivery. No refund for carriage cost will be offered, if delivery is delayed as a result of no valid contact number being provided.
3) I welcome collection for orders,please select collection on checkout otherwise your order will be despatched. Once your order has been picked and tested if applicable. We will then inform you of a date and time for collection. Please bring your payment card for verification when collecting your order. No order will be released without card verification.
4) I am unable to provide ANY technical support, please ensure you fully understand how this item works by checking for any datasheets (not provided with the item), to enable the product to be used within your application / project.
5) VERY IMPORTANT >> Do not make ANY permanent connections. Please test the item BEFORE making any permanent connections e.g. soldering to the item. Please ensure you have the means to test the item WITHOUT applying ANY solder to the item. If an item has any solder applied I will NOT accept any return.
6) When upgrading to 1st class post, (if the option is available), please note this is sent via Royal Mail and is not a guaranteed next day service. If you need a 48hr service please select 48hr delivery at extra cost. This will be sent via Royal Mail or courier. I do not offer a 24hr service. No weekend or public bank holiday deliveries.
7) We attempt to send out all orders received before 10.00am. This excludes weekends and public holidays.
8) Customers placing multiple orders. – I may ship all the orders as one, please do not ask for a refund of shipping cost after you have placed your orders. Please do not place your orders if you want a refund of shipping cost.
9) Some items may have a “Warranty Void if removed” sticker, please DO NOT tamper or remove these stickers. I will not accept any rertuns with tampered or removed sticker. Some buyers have tried to send back items that I have not supplied.

**** Important note **** Some sellers claim the stock is in the UK, please be careful, the seller is often in China and sends the item to a UK agent who then forwards the item on with a UK stamp. Check where the seller is located not just the item location. All my items are physically with me, here in the UK and I offer a quick delivery and communication within the UK.

During busy periods there maybe a delay in delivering your package by Royal Mail. I apologies in adavnce for any inconvenience but would like to point this out before you place your order.