Pressure sensor recommendation - Page 1
Forum section: electronics / general

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 21, 2019, 08:14:16 am
content: Hi,One of my customers has a new project, he asked me to find a Pressure sensor with these specs,It should be able to measure 600BAR and should be able to withstand at least 125C working environment, also it should have an accuracy of about +-0.05% FS psiSearching digikey, I was confused, since I never used a Pressure sensor before, I prefer SMD and Digital output, do we have something? also I can cope with other type too like the analog output versions.ASiDesigner

author: voltsandjolts
author_rank: Unknown
timestamp: October 21, 2019, 08:45:08 am
content: 600bar - forget about SMD!+-0.05% FS psi is quite demanding for that temperature & pressure range.You are probably aware of Quartzdyne who market calibrated sensors for your application, +-0.02% FS and ~5-20KUSD.They will likely be unavailable to you at the moment, assuming your country flag is set correctly.There are very few other (none?) viable resonating pressure sensors openly available for your temperature range.So, pick a strain gauge, do your own calibration (you have a dead-weight pressure generator, right?) and you may get to +-0.05% FS.Kulite, Kistler, Keller, Paine, Sensonetics....again, availability in your country may be an issue with some of those.

author: beanflying
author_rank: Super Contributor
timestamp: October 21, 2019, 08:58:19 am
content: You are into really into Hydraulic territory at 600Bar. Are you dealing with fluid or gas and which one and if your client hasn't specified then get some details before you go forward?I used to work for part of this company in Oz and some of there gear should be suitablehttps://www.stauff.com/index.php?id=4238&L=1and being German hopefully available to you.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 21, 2019, 09:36:36 am
content: Thanks for the tips, There is always china to get the parts, Hopefullythe problem for now is finding the damn thing!I think it would be used for Oil maybe, I'm guessing tough. if I ask them to increase the accuracy, is it easier?

author: voltsandjolts
author_rank: Unknown
timestamp: October 21, 2019, 09:47:39 am
content: Yes, almost certainly your customer requires a pressure sensor for use in the depths of an oil well.Decreasing the accuracy requirement for any measurement system makes it easier

author: beanflying
author_rank: Super Contributor
timestamp: October 21, 2019, 09:49:10 am
content: You will want to ask some of the following sort of questions as the sensor build will vary.Chemistry (if they will tell you)Viscosity (this sort of info the sensor company will likely ask you)Hazzard level (If EXE or EXD type of rating is needed so you don't blow up or is LV DC ok providing it has no contacts?)Generally Viton for an elastomer is fine for most petrochem products but ask what they use (maybe teflon or ??).Unless you have a trusted source in China you don't want to go there. Petrochem industry is generally touchy about what it will and won't allow from Cables to sensors to even enclosures.

author: SiliconWizard
author_rank: Super Contributor
timestamp: October 21, 2019, 01:13:34 pm
content: The +/-0.05% requirement will be, of course, very challenging.Be aware that at this pressure range, the mounting of the sensor will be ultra-critical, but you probably already know that.I recommend this:https://metallux.ch/pressuresensor/?pressure_sensors_view_type=tablevery good products.

author: ali_asadzadeh
author_rank: Super Contributor
timestamp: October 22, 2019, 06:21:57 am
content: Thanks for the tips

author: rvalente
author_rank: Frequent Contributor
timestamp: October 22, 2019, 03:28:02 pm
content: Check: gefran, balluff, wika and IFM