Searching for a Sensor / Transducer

[S6PNJ]

My Google-fu is letting me down (as is my DuckDuckGo and Bing - fu) so its over to the PH boffins for help.

I'm searching for a water pressure sensor / transducer that I think I need to replace, but am not having much luck finding the source from where it came. It would be measuring pressure in the 0-5 bar range at a guess and is (in my usage) a low pressure sensor.

The numbers I have from the parts are: P66828711 01S0.5D Made in Italy and J - 14 - 4

This is the 'mechanical' part and the electrical part (which I think is just a plug for the electrical contacts, nothing 'intelligent' about it, is made by HTP - but I can't identify which item of theirs it is. https://www.webhtp.eu/

Anyone manage to find it on a 'sales' page anywhere? Click the images for bigger pics.

[S6PNJ]

Bumping for any new views and thoughts....

[S6PNJ]

I'd still like to try and find a supplier for this item if anyone can suggest anything?

[Hawkshaw]

What is it for? It's perhaps stating the obvious, but have you tried searching using the make and model of the equipment that it is used in? Makers of boilers etc. tend to use their own part numbers and names. It is quite surprising what is available, even for very old equipment, but you have to use the right search terms.

[MattyD803]

I wonder if a different way to approach this is to advise us on what this sensor/switch is being used for? Then perhaps suitable alternatives can be sourced to meet the need, rather than like for like replacement?

[S6PNJ]

It is being used to measure water pressure in the range of 0 - around 4 bar (the manual analogue guage for visual purposes has 0-4 bar range). It feeds electrical signals to a control board.

Googling the equipment it is attached to leads to nothing. I also don't have the signalling requirements so I don't know the voltage range or current values expected. My usage uses 2 out of the 4 wires so I suspect it is a simple resistance type device at a rough guess.

[Lotobear]

...might there be something from the automotive parts bin that could be re purposed - oil or brake fluid pressure sender?

[tux850]

What equipment is the control board in?

Edited by tux850 on Thursday 27th November 17:16

[tux850]

S6PNJ said:

Googling the equipment it is attached to leads to nothing. I also don't have the signalling requirements so I don't know the voltage range or current values expected. My usage uses 2 out of the 4 wires so I suspect it is a simple resistance type device at a rough guess.

Being two wire means it'll be variable current output. Start with measuring the open circuit voltage from the control board. There's a good chance it'll be 24v DC which is a de facto industry standard for this sort of thing, in which case the likely current output range will be the equally common 4 - 20mA representing the full scale deflection for the 0 - 5 bar detectable range.

More info is needed about what this is used for/by though. Context is everything.

Don't be thrown by the connector and its markings. It's just a generic ISO plug.

Edited by tux850 on Thursday 27th November 17:31

[Jo-say8k]

Have a look at RS components, plenty of pressure transducers there

[S6PNJ]

tux850 said:

S6PNJ said:

Googling the equipment it is attached to leads to nothing. I also don't have the signalling requirements so I don't know the voltage range or current values expected. My usage uses 2 out of the 4 wires so I suspect it is a simple resistance type device at a rough guess.

Being two wire means it'll be variable current output. Start with measuring the open circuit voltage from the control board. There's a good chance it'll be 24v DC which is a de facto industry standard for this sort of thing, in which case the likely current output range will be the equally common 4 - 20mA representing the full scale deflection for the 0 - 5 bar detectable range.

More info is needed about what this is used for/by though. Context is everything.

Don't be thrown by the connector and its markings. It's just a generic ISO plug.

I've now had chance to get my multimeter onto it. I 'see' 25V with the transducer disconnected, so yes, most likely 24V. When it is in place and working (sensing at leat 1Bar), I get 0V, so it's probably just a simple pressure / no pressure measure as the actual pressure is immaterial to its use (domestic hot water system).

[cookie1600]

This should send you off on a wild Goose chase:



Try ringing Euroswitch for an equivalent or asking a local plumbing store for one with similar thread and connector?

[S6PNJ]

I think (from additional searching) a suitable replacement might be one of these - https://elettrotec.com/en/product-configurator/?fr... which is a PSM-10 by Elettrotech (0-10 BAR). Without removing the item, I don't know its thread and I'd need to depressurise my system (it's hooked up to a 300L expansion tank and a 2000L thermal store with isolation ball valves here and there) to remove it, so ideally I'm still looking for info on the actual item rather than a replacement - but knowing I might need to replace it so will have to 'fight that fight' when I get to it.

[cookie1600]

This company are close to me and have been going for years. It might be worth getting in contact with them

https://www.appeng.co.uk/products/pressure/pressur...

[S6PNJ]