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PR-21
RTD Probes with Mounting Threads and M12 Connectors
Models In Stock
PR-21
From
$
117.30
Models In Stock
Product Overview
Show Ratings & Reviews
Rated 5 out of
5
by
Chris Lanning from
Everything you want from an RTD
Simple, accurate, and reliable. I use these for all dirty air or bulk biomass applications
Date published: 2025-01-22
Rated 5 out of
5
by
Vicki Brown from
these connect really well
easy connection into the RTD and the sensor hooks up great
Date published: 2024-12-05
Rated 5 out of
5
by
GregO from
Direct Replacements
These RTD's have great build quality and work well. They are offered in multiple wiring schemes, allowing them to be used as direct replacements parts for products like Meriam MDT500 integrated laminar flow element devices.
Date published: 2023-04-06
Rated 5 out of
5
by
skip77j from
rtd
great quality, very accurate, and the quick disconnect feature makes swapping them out a breeze.
Date published: 2021-06-21
Rated 4 out of
5
by
Anonymous from
Good RTD
Good sensor overall. The shaft can be sealed to <10E-5 TorrL/s helium with an 1/8 inch Swagelok bored through tube fitting. Be careful not to bend the shaft though, the 1/8 inch is pretty delicate.
Omega's mating cable is also pretty good but I wish they offered a shielded version with a metal connector.
Date published: 2020-05-22
Could this be used in a flow apparatus to measure temps from -40F-140F with an accuracy of 0.5% full scale?
Thank you for your inquiry Pipeline Engineer. Yes you can use this sensor to measure the temperature of the flow stream. This probe has an accuracy of Class A = ±(0.15 + 0.002*t)°C or 100.00 ±0.06 O at 0ºC. Here is the link for more information about the accuracy of a Class A RTD: https://www.omega.com/en-us/resources/rtd-hub
Date published: 2022-09-19
Okay I saw the option 1 & 2 diagram that but where’s pin 1, 2, 3 & 4 on the probe located. If only hooking up a 3 wire probe what wire do I not connect. Sorry not much information on the datasheet.
On the datasheet wiring diagrams you can see that 2 wires are common on each side of the PT100 symbol. If you only have a 3 wire input instrument you can just leave one wire from either side unconnected. If you are unsure you can always measure point to point on the wire to make sure the PT100 is located correctly per your instruments wiring diagram.
Date published: 2020-04-03
What is the pressure rating for the 1/2" NPT probe?
Thank you for you inquiry. Unfortunately this device doesn't have pressure rating.
Date published: 2020-11-16
I'm looking at the product details for this probe; Vibration Resistant Platinum RTD (PT100) Sensor with M12 Connector and Mounting Thread, Item# PR-21B-3-100-A-1/4-1200-M12-1. And can't find the wiring diagram for it
If you click on Datasheet(PDF) under the bullets on the product page there is a wiring diagram for both available options.
Date published: 2020-04-01
What is the resistance of the RTD at its temperature extremes? What is the temperature coefficient?
Thank you for your inquiry Anonymous. The resistance of this RTD at any temperature is 100 ohms. The alpha value for a Pt100 RTD like the PR-21D-3-100-A-1/8-0600-M12-1 is 0.00385.
Date published: 2022-09-19
How I can represent this product PR-21A-3-100-A-1/8-0475-M12-1 as a AutoCAD drawing? Especially there are 4 pin, Could you name it please?
Omega does not provide CAD drawings of it's products so send a request to temp@omega.com to see if any dimensions of the probe needs to be discussed in greater detail.
Date published: 2022-07-25
Can these be used without a thermowell using compression fittings? What would the pressure rating be for that type of application?
You can use a Compression fitting to seal the PR-21 series into a process however Omega does not specify a pressure rating.
Date published: 2020-04-01