3-A Approved Sanitary RTD Sensors with Polypropylene or Stainless Steel Connection Heads

Note: These Sensors Require an M12 Extension Cable to Connect the Sensor To Your Instrumentation. A Partial List Of Our M12 Extension Cables is Included in the Ordering Table Below.

Sanitary Temperature Sensor Specifications Include:

3A Approved 316L stainless steel wetted surfaces with surface finishes of 32 microinches or better.

Mounting flanges are 16AMP style conforming to ASME-BPE-2007 for proper fit with CIP systems.

Probe designs include a 1/4' diameter standard duty and a stepped 3/16 to 3/8' heavy duty design.

Standard probe lengths of 3, 4, 5 or 6' available from stock, other lengths available as special orders.

Sensor is a 4-wire, 100 ohm, Class A, Platinum Pt100 RTD meeting the requirements of IEC 60751.

Connection is a 4-pin M12 plug style connector.

These sensors can be used with 2-wire, 3-wire or 4-wire systems see information below.

Insulation resistance: 100 megohms minimum at 100 VDC.

Thermal response time of less than 2.5 seconds in water flowing at 3 ft/sec (63% response).

The 3-A Approved OMEGA™ PRS-S-M12 and PRS-H-M12 Series RTD Sensors are designed for use in Sanitary or Hygienic Clean-in-Place applications in the Food, Dairy, Beverage and BioPharmaceutical industries. These temperature sensors are manufactured with 316L stainless steel housings that meet the dimensional and finish requirements of 3-A Standard 74-05 and ASME BPE-2007, and are welded and processed to provide a clean, smooth, 32 microinch or better surface finish in the wetted areas for Clean-in-Place processes.

The probe stems are manufactured in two configurations; with a standard ¼' diameter probe for standard duty service, and a stepped 3/8' to 3/16' diameter probe design for good response times in heavy duty applications.

In addition to the standard 1½-16AMP process connection, these can be provided in the following sizes and styles:










If you need a process connection that is not listed above, please contact our sales department for availability.

A 4-Pin M12 Connector provides a quick and convenient connection point for process wiring. Omega offers a full line of M12 extension and patch cables in a variety of cable materials, lengths and connector configurations.

These sanitary RTD sensors are supplied standard as 4-wire assemblies with 4-pin connectors.
When used in 3-wire applications, use pins A, B and C as shown in the wiring detail below.
When used in 2-wire systems, connect one wire to pins A or B and the second wire to pins C or D as shown below.



This M12 connector style sensor is also available with a Thermistor sensing element in order to accommodate a wide variety of input requirements.