navitron
 
Renewable Energy and Sustainability Forum
Welcome, Guest. Please login or register.

Login with username, password and session length
News: Anyone wishing to register as a new member on the forum is strongly recommended to use a "proper" email address - following recent spam/hack attempts on the forum, all security is set to "high", and "disposable" email addresses like Gmail, Yahoo and Hotmail tend to be viewed with suspicion, and the application rejected if there is any doubt whatsoever
 
Recent Articles: Navitron Partners With Solax to Help Create A More Sustainable Future | Navitron Calls for Increased Carbon Footprint Reduction In Light of Earth Overshoot Day | A plea from The David School - Issue 18
   Home   Help Search Login Register  
Pages: [1]   Go Down
  Print  
Author Topic: Pressure Sensor in hot water  (Read 13711 times)
2ndBillericay
Full Member
***
Offline Offline

Posts: 113



WWW
« on: August 03, 2012, 02:31:24 PM »

In order to add the pressure reading to the data shown by my Resol DL2 data recorder i am looking for a cheap (under GBP 50) electronic pressure sensor.


Has anyone found a suitable sensor ?

Thanks
Logged

2.16 Kw = 9 x 240w on flat roof, South facing and at 20 degrees. - Installed 26-08-10
Nuclear Fussion Thermal system DeltaSol BS & DL2 - installed 25-03-11
Iain
Hero Member
*****
Offline Offline

Posts: 1721


« Reply #1 on: August 03, 2012, 02:40:07 PM »

Hi
I was looking at these in RS. Quite a few with different parameters. Worth a look possibly.
http://uk.rs-online.com/web/p/pressure-sensors/7191144/
Iain
Logged

1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
2ndBillericay
Full Member
***
Offline Offline

Posts: 113



WWW
« Reply #2 on: August 06, 2012, 02:03:28 PM »

I was looking at similar but not sure about interfacing the air sensor with the water in the solar heating system.

i was wondering about a PX40-100G5V but again the connection issue confused me a little as the pope attachment is only 2.8mm diameter. I would need to connect some pipe that i could fix securely to it and then add a water fixing on the other end.

Any ideas ?

Thanks
Logged

2.16 Kw = 9 x 240w on flat roof, South facing and at 20 degrees. - Installed 26-08-10
Nuclear Fussion Thermal system DeltaSol BS & DL2 - installed 25-03-11
JohnS
Hero Member
*****
Offline Offline

Posts: 2020


« Reply #3 on: August 06, 2012, 07:02:11 PM »

2nd Billericay

Sorry to be off topic, but I know you will see it here.

Has anything happened to your PV?  Production, per BDPV, seems to be down a lot this year.

John
Logged

2.1kWp solar PV
Les101
Full Member
***
Offline Offline

Posts: 129


« Reply #4 on: August 06, 2012, 09:04:35 PM »

Can you use an electric oil pressure sensor off a car? Should have no problem with the temperatures involved
Logged
noah
Hero Member
*****
Offline Offline

Posts: 502


« Reply #5 on: August 07, 2012, 11:36:35 AM »

I have concerns about pope attachments. Let`s keep the forum secular guys.
Logged
2ndBillericay
Full Member
***
Offline Offline

Posts: 113



WWW
« Reply #6 on: August 07, 2012, 11:52:48 AM »

that could be worth a try, i just need to find one that will give a decent electronic output. I dare say (before looking) that fords etc dont give out spec for the parts.

More thought needed on this avenue.

Thanks
Logged

2.16 Kw = 9 x 240w on flat roof, South facing and at 20 degrees. - Installed 26-08-10
Nuclear Fussion Thermal system DeltaSol BS & DL2 - installed 25-03-11
Iain
Hero Member
*****
Offline Offline

Posts: 1721


« Reply #7 on: August 07, 2012, 12:19:30 PM »

Hi
A lot of the VDO sensors work on 10 ohms to 184 ohms range. You just have to pick the correct pressure range. I think the American sensors / gauges work the opposite way around to the European ones.
IE (VDO-European) I think!! 10 ohms = 0 pressure.. 184 ohms = full pressure
American I think are the other way around 184 ohms = 0 pressure .. 10 ohms = full pressure.

I think most older car/boat pressure gauges work on similar standards.
 A local had a boat with a VDO sender with a Vetus Gauge. On 0 Bar engine pressure gauge reads max. As the pressure increased the reading on the gauge dropped. We just fitted a VDO gauge and all worked correctly.!!

Iain
« Last Edit: August 07, 2012, 12:23:33 PM by Iain » Logged

1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
2ndBillericay
Full Member
***
Offline Offline

Posts: 113



WWW
« Reply #8 on: August 07, 2012, 02:20:33 PM »

Time to see what i can find on ebay. Lets see if i can find a sensor that gives a graduated reading rather than pressure/no pressure/high pressure.

Logged

2.16 Kw = 9 x 240w on flat roof, South facing and at 20 degrees. - Installed 26-08-10
Nuclear Fussion Thermal system DeltaSol BS & DL2 - installed 25-03-11
Iain
Hero Member
*****
Offline Offline

Posts: 1721


« Reply #9 on: August 07, 2012, 03:01:25 PM »

Hi
This one is 0-2 bar, or there must be similar.
http://www.gtfabrications.com/product.php?productid=434
Iain
Logged

1.98kWp PV (11 x Sharp 180 and SB 2.5)
20 x 65mm Thermal and 180ltr unvented
Powervault 4Kw - G200 Lithium-Ion (LiFePO4)
9000ltr rainwater storage   Plymouth
baker
Sr. Member
****
Offline Offline

Posts: 320


« Reply #10 on: August 07, 2012, 07:06:07 PM »


 some sunier duval combi
and some glowworm combi,s have a LCD linear graph analogue water pressure  display and sensor
maybe worth a look
baker 

Logged
Pages: [1]   Go Up
  Print  
 
Jump to:  

Powered by MySQL Powered by PHP Powered by SMF 1.1.20 | SMF © 2013, Simple Machines
SMFAds for Free Forums
Simple Audio Video Embedder
Valid XHTML 1.0! Valid CSS!