0-100psi liquid pressure sender equivalent to LM34 temp sensor?
0-100psi liquid pressure sender equivalent to LM34 temp sensor?
(OP)
Can anyone help me identify a pressure sensor suitable for water pressure duty that is roughly equivalent to Nationals LM34 temperature sensor in terms of cost, linearity, mV output range, and ease of implementation?
Thank you so much.
Thank you so much.





RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
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RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
-Reidh
RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
> Linear +10.0 mV/°F scale factor
> 1.0°F accuracy guaranteed (at +77°F)
> Operates from 5 to 30 volts
> Nonlinearity only ±0.5°F typical
> Cost ~ $0.84 in SOIC and $4.00 in TO-92 at 1000 pieces
The big issue here is cost. What people typically think of as "low cost" does not exist in pressure sensors. Inexpensive pressure sensors run around $20 each in volume.
The lowest cost automotive-type are made by Sensata (formerly the Texas Instruments sensors division). I have priced these in the 2500 piece volumes for a 1 to 5 volt output 250 psi sensor for about $20 to $30 with accuracy and linearity specs similar to what you indicate. This is actually a very good price for a automotive grade fully conditioned pressure sensor ready to screw-in and with built-in connector. Honeywell and MSI make similar type sensors.
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RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
Kavlico
Novasensor
RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
MPX5700GP
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It's only 14.00 USD and seems to be adequate for very basic pressure monitoring. There is little information about isolation when used for liquid PSI. Any reason why it wouldn't work if used to measure air pressure in a tube connected to the water circuit?
RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
I'll contact the folks at that sensata link. Thank you for that. I'll see if they can help me identify what I need. I'm looking at a pretty small volume of these, so twenty to thirty dollars is not out of range at all.
Sealed and threaded would be a very attractive plus.
RE: 0-100psi liquid pressure sender equivalent to LM34 temp sensor?
Since you posted in an automotive forum, I suggested an automotive grade transducer. There are other manufacturers who make transducers similar in appearance to the Sensata, who also serve the vehicle market (such as Kavlico suggested by sreid). The problem with low volumes is sometimes finding a part that is standard enough that it's available at low volume. Many of the companies servicing vehicles and automotive world only sell in high volume with only a few offerings available otherwise.