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Industrial RTD Probe with Aluminum Protection Head


Item# PR-18E-3-100-1/4-6

Calibration service available for this series

Volume discounts available
Volume Discount Schedule
Quantity Price each
1-4 C$134.00
5-9 C$127.30
10-24 C$124.62
25-49 C$119.26
50-99 C$116.58
100+ C$113.90

In stock

Lead Time ( If not in Stock): 3 weeks

Industrial RTD Probe with Aluminum Protection Head PR-18E-3-100-1/4-6 PR-18E-3-100-1/4-6
  • Standard Size Aluminum protection head
  • Class A accuracy conforming to IEC 60751
  • Low temperature range: -50 to 250°C (-58 to 482°F)
  • High temperature range: -50 to 450°C (-58 to 842°F)
  • Extreme temperature range: -200 to 600°C (-328 to 1112°F)
  • Choice of PT100 Ω or PT1000 Ω element
  • Standard probe lengths of 2, 3, 4, 6, 9, 12, 18 and 24 in.
  • Inside dimensions for the aluminum head: Diameter: 2.3 inches; Height: 2.2 inches

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Number of Wires
Sheath Material
Probe Diameter
Probe Length
Termination Connection Type
Additional Feature

Product Specs

Omega's PR-18 series probe with standard aluminum protection head with flip-top includes PT100 Ω platinum RTD element or PT1000 RTD element and 1/2" NPT mounting threads. The sheath is made of 316 stainless steel. These probes can be used alone, or can be placed directly into a thermowell. The spring load option should not be ordered unless a thermowell is used. All probes include a screw terminal block for easy connection of insulated copper extension wire. Replacement probes (without protection head assembly) are available as well as a "spring-loading" option which allows for the probe to bottom out in a thermowell for quicker and more accurate response. This probe can be used in tanks, vessels, and large pipes for measurement of flow material.

Inside dimensions for the aluminum head: Diameter: 2.3 inches; Height: 2.2 inches.

Rated 5 out of 5 by from Greats Everything good. Thanks My customer was very excited
Date published: 2016-11-21
Rated 5 out of 5 by from RTD is perfect. Customer Service is terrible. This RTD was a perfect replacement for the original which had failed in a critical manufacturing system. The information in the online catalog showed all different options and availability which allowed selection of an in stock unit for quicker delivery.
Date published: 2021-10-02
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Are the heads on these RTDs suitable for DIN Form B transmitter mounting? Aka, can you mount a hockey-puck transmitter inside of them?

Asked by: SKahle89
Hello and thank you for this question. Yes, you may use hockey-puck transmitters within the heads of these RTDs. The TX-12 is a perfect example of a transmitter that will fit and can be found though this link here https://www.omega.com/en-us/communication-and-connectivity/signal-conditioners-and-transmitters/signal-conditioners/p/TX12-Series
Answered by: AEMO
Date published: 2020-05-15

Have a PR-18H-3-100-1/4-6 RTD probe with alum head. The termination head assembly sticks out too far. Is there a smaller head that can be assembled to the 1/2" NPT probe or a similar probe that I can interchange that has smaller head and 3/8 NPT thread?

Asked by: Anonymous
Thank you for your inquiry. A smaller head that would be compatible with the PR-18H-3-100-1/4-6 RTD probe would be the NB2-2 head which is the miniature version of the one you currently have. Unfortunately, we do not offer the 3/8 NPT thread.
Answered by: Application Engineer SP
Date published: 2021-12-03
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