Welcome to our new website, found an issue or bug? Please report it here
PR-25AP
-100 °C to 250 °C RTD Air Temperature Probes M12 Connector
Models In Stock
- Pt100 Wire Wound RTD with Class A Accuracy Standard (Tighter Accuracy Options Available)
- Resistance vs. Temperature and Accuracy per IEC 60751
- Temperature Range: -100 to 250°C (-148 to 500ºF)
- Probe Will Withstand 400 psi (27.6 bar) Differential Pressure Between Airstream and Ambient Conditions
PR-25AP
From
$
195.50
Models In Stock
Product Overview
- Electrical Connection M12 4 pin Female
- Nominal Resistance 100 Ω
- Number of Wires 4
- Probe Diameter 0.25 in
- Process Temperature, Max 250 °C
- Process Temperature, Min -100 °C
- Sheath Material 316L Stainless Steel
- Temperature Sensor Type RTD
- Wiring/Connector Table 1
Our PR-25AP RTD Air Probe combines the availability of the high accuracy sensor options found in our Ultra-Precise RTD probes with the convenience and reliability of our M12 enabled PR-21 probes. The PR-25AP offers RTD accuracies of Class A, AA (formerly 1/3DIN) and 1/10DIN sensing elements with the ease and reliability of the M12 connection.
The PR-25AP RTD is also designed to provide a barrier to airflow between the air stream and the ambient conditions that has been tested to 400 psi with no leakage. The probe is constructed with a 316L stainless steel housing and sheath for strength and corrosion resistance. For ease of mounting, the PR-25AP is available with the following mounting thread options:
1/2NPT 3/8NPT 1/4NPT Non-Threaded Housing
The mounting thread options above allow the probes to be used in a wide variety of applications, including:
As stand-alone immersion sensors. Installed directly into your product or process using an NPT threaded port. The non-threaded design can be combined with our M12-Handle accessory to convert it for hand-held sensing applications. Other applications using a variety of available compression fittings or other accessories.
The PR-25AP, like all of our M12 enabled probes, comes standard with a 4-wire, 4-pin, M12 A-Coded plug connector for easy assembly to extension cables. This allows it to be used in any 2, 3 or 4-wire measurement system for maximum flexibility. For 1/10DIN accuracy we highly recommend using a 4-wire measurement to take maximum advantage of the tight accuracy option.
![]()
When ordering your PR-25AP sensor, don't forget your extension cable. Omega offers a wide selection of extension cables including over molded PVC, Polyurethane and Silicone cables, as well as customized cables in a variety of materials with optional stainless steel braid or hose for improved mechanical protection, and a wide selection of instrument connections.
Connect your PR-25AP RTD sensor to one or more of Omega's wide variety of in-stock controllers, data loggers, transmitters, hand held thermometers, PLCs, or other measurement & control products to complete your measurement or control system. Omega offers a selection of programmable and fixed range transmitters that can be connected directly to the M12 connection of your PR-25AP sensor. There are also wireless transmitter options available.
Specifications:
Metal Parts: 316L Stainless Steel Sheath and Housing. Connector: 4-Pin 'A'-Coded M12 Plug Connector Standard Mounting Threads: 1/2NPT, 3/8NPT, 1/4NPT, and Non-Threaded Standard Probe Diameter: 1/4' Standard Probe Lengths: 6', 12” and 18” Sensor: Pt100 (100 Ohms at 0°C, .00385 TCR (alpha)) per IEC 60751 Accuracy: Class A, AA (formerly 1/3DIN) per IEC 60751 and 1/10DIN Temperature Range: -50 to 250°C Except for the Connector Which is 85°C Max Insulation Resistance: 100 Megohms Minimum at 100VDC at Room Ambient
The PR-25AP RTD is also designed to provide a barrier to airflow between the air stream and the ambient conditions that has been tested to 400 psi with no leakage. The probe is constructed with a 316L stainless steel housing and sheath for strength and corrosion resistance. For ease of mounting, the PR-25AP is available with the following mounting thread options:
The mounting thread options above allow the probes to be used in a wide variety of applications, including:
The PR-25AP, like all of our M12 enabled probes, comes standard with a 4-wire, 4-pin, M12 A-Coded plug connector for easy assembly to extension cables. This allows it to be used in any 2, 3 or 4-wire measurement system for maximum flexibility. For 1/10DIN accuracy we highly recommend using a 4-wire measurement to take maximum advantage of the tight accuracy option.
When ordering your PR-25AP sensor, don't forget your extension cable. Omega offers a wide selection of extension cables including over molded PVC, Polyurethane and Silicone cables, as well as customized cables in a variety of materials with optional stainless steel braid or hose for improved mechanical protection, and a wide selection of instrument connections.
Connect your PR-25AP RTD sensor to one or more of Omega's wide variety of in-stock controllers, data loggers, transmitters, hand held thermometers, PLCs, or other measurement & control products to complete your measurement or control system. Omega offers a selection of programmable and fixed range transmitters that can be connected directly to the M12 connection of your PR-25AP sensor. There are also wireless transmitter options available.
Specifications:
PDFs & Manuals
Accessories
M12 Cables with Field Mountable Connectors for Resistance Sensors (RTDs)
$87.54
3 In Stock
M12 Cables with Field Mountable Connectors for Resistance Sensors (RTDs)
$60.52
1 In Stock
M12 Cables with Field Mountable Connectors for Resistance Sensors (RTDs)
$66.51
7 In Stock
M12 Cables with Field Mountable Connectors for Resistance Sensors (RTDs)
$84.02
14 In Stock
Miniature Temperature Transmitter for Sanitary RTD Probes and Sensors
$229.52
0 In Stock
Show Ratings & Reviews
Rated 5 out of
5
by
Chris Lanning from
Everything You Want from an RTD
Simple, accurate, and reliable. I used these for all clean air applications.
Date published: 2025-01-22
Rated 5 out of
5
by
Darren Youngblood from
My Go-To
Easy Order, Great Packaging. My Go-To source for Temp supplies
Date published: 2024-07-08
What is the 50% response time for these sensors?
Thank you for your inquiry! 50% Response is the time the resistance thermometer element needs in order to reach 50% of its steady state value. 90% Response is defined in a similar manner. These response times of elements are given for water flowing with 0. 2 m/s velocity and air flowing at 1 m/s. For more information on RTD response time, please see this Technical Reference from our UK site: https://www.omega.co.uk/temperature/z/resistanceelements.html
Date published: 2022-01-11
Is your "1/10 DIN" RTD actually "1/10*Class B" across their full operating range or only at 0°C? For example, is their accuracy ±0.13°C at 200°C (1/10 of Class B, which is ±1.30°C) or something else? If something else, please provide a formula or table.
Thank you for your inquiry. This is the tolerance equation for it: 1⁄10 DIN = ±1⁄10* (0.3 + 0.005*t)°C or 100.00 ±0.03 Ω at 0ºC
Date published: 2021-06-29
can you tell me the response time? the documentation just says fast. How fast?
Thank you for your inquiry! 50% Response is the time the resistance thermometer element needs in order to reach 50% of its steady state value. 90% Response is defined in a similar manner. These response times of elements are given for water flowing with 0. 2 m/s velocity and air flowing at 1 m/s. For more information on RTD response time, please see this Technical Reference from our UK site: https://www.omega.co.uk/temperature/z/resistanceelements.html
Application Engineer CK
Date published: 2022-01-10
Is this temperature probe submersible into liquids?
Thank you for your inquiry. This air probe is designed for measuring air only and cannot be submersed in liquids. We offer sealed probes that are designed for liquid submersion.
Date published: 2020-11-19
I know what a response time is and that they are determined either in water at 0. 2 m/s velocity and air flowing at 1 m/s. What is the response time for this sensor?
Thank you for your inquiry. Response Time would be less than 5 seconds.
Date published: 2022-01-25