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P-Ultra-RTD
Ultra Precise RTD Sensors for Industrial Applications
Models In Stock
- 100 Ohm DIN Platinum RTDs with Class “A”, 1/3 DIN and 1/10 DIN Accuracies
- Temperature Range Varies with Cable Selection and Accuracy Class (See Description Below).
- Available in Two Models:
- Standard Closed End Sensor for Immersion Applcations
P-Ultra-RTD
From
$
69.27
Models In Stock
Product Overview
- Electrical Connection Stripped Leads
- Nominal Resistance 100 Ω
- Nominal Resistance/Curve Note Pt100 (100Ω @ 0ºC 0.00385Ω/Ω/ºC) Platinum RTDs with Class “A”, 1⁄3 DIN and 1⁄10 DIN Accuracies
- Number of Wires 4
- Probe Type Ultra Precise RTD Sensors
- Series ID P-Ultra-RTD
- Sheath Material 304 Stainless Steel
- Temperature Coefficient 0.00385Ω/Ω/°C
- Temperature Coefficient Note α=0.00385Ω/Ω/°C
- Temperature Sensor Type RTD
- Wire Gauge 26 AWG
- Wire Type Stranded
Supported Applications
The Omega P-Ultra RTD series comprises Ultra Precise Immersion Sensors and Air and Gas Measurement Sensors. These Pt100 (100Ω @ 0°C) Platinum Resistance Temperature Detectors are engineered for liquid immersion applications as well as air and gas environments, where the sensors feature vent holes to allow direct airflow to the RTD element.
Operating Conditions & Performance
The series operates across a process temperature range of -100 to 400°C (-148 to 752°F). Sensors utilize Pt100 elements with an alpha coefficient of 0.00385 Ω/Ω/°C and are available in Class A, 1/5 DIN, or 1/10 DIN accuracy classes. The interchangeability specifications vary by temperature point; for example, at -100°C the tolerance is ±0.35°C (Class A), while at 400°C it reaches ±0.95°C.
Standard construction features a stainless steel sheath with diameters of 3 mm (1/8") or 6 mm (1/4"). The electrical connection is specified as 4-Wire Construction to minimize lead wire resistance errors. Standard cable length is 1 m, consisting of #26 AWG stranded cable with stripped ends.
Configuration Options
The P-Ultra series supports extensive configuration options for mounting threads, probe lengths, and cable insulation materials tailored to specific environmental constraints.
- Sensor Accuracy: Class A, 1/5 DIN, or 1/10 DIN.
- Diameters: 3 mm (1/8") or 6 mm (1/4").
- Mounting Threads: Available in NPT sizes including 1/8 NPT, 1/4 NPT, 3/8 NPT, and 1/2 NPT. Metric threads include M6x1, M8x1, and M10x1.
- Cable Insulation: PVC (-29 to 100°C), PFA (-100 to 250°C), Fiberglass (-73 to 400°C), or Silicone Rubber (-50 to 200°C).
- Shielding Options: Available for PVC, PFA, and Fiberglass cables (designated PS, TS, GS).
- Probe Lengths: Standard lengths include 6" or 150 mm; customizable insertion lengths are supported.
Sensors with a transition fitting at the end of the sheath are included for 3 mm (1/8") and 6 mm (1/4") diameter sensors without threaded fittings when paired with P, PS, TS, GS, or S cables. Note that M6 threads are not available on 6 mm Dia probes.
Key Product Differences
The series is divided into two primary functional families: Immersion Sensors (Model prefix P-M-) and Air/Gas Sensors (Model prefix P-L-). The model number structure follows the pattern of Accuracy, Sensor Diameter, Mounting Thread, Probe Length, Cable Insulation type, and length code. For example, a 1/8" diameter sensor with Class A accuracy, no thread, 6" probe, PVC cable, and 3' length is designated P-M-A-1/8-6-0-P-3.
Model variations allow for specific customization of the sheath material (Stainless Steel), mounting configuration (threaded vs. unthreaded with transition fitting), and insulation type to match process temperature limits.
PDFs & Manuals
Accessories
meters/controllers
1/16 DIN On-Off LCD Temperature Controllers with Dual Outputs
$356.81 / each
0 In Stock
sensors
Show Ratings & Reviews
Rated 2 out of
5
by
Engineer8736 from
Not as accurate as indicated
Purchased 2 1/10 DIN RTDs and immediately sent them out for calibration. One is at the accuracy limit and the other is significantly outside the accuracy limit.
Date published: 2018-12-06
Rated 4 out of
5
by
li sev from
Good quality
Good quality. No complaints. Shipped in an acceptable amount of time.
Date published: 2023-12-18
What is the color code for the leads on the Ultra-P RTD?
There are 2 Red wires for connection to the + inputs and 2 Whites for connection to the - inputs on the instrumentation.
Date published: 2025-09-11
Is the stainless steel probe electrically isolated from the inside circuitry? Do I need to be worried about potentially grounding the stainless steel probe?
The RTD sensor and wires are isolated from the sheath so there would be no conduction between them.
Date published: 2026-07-02
What is the Pressure Rating for Part#: P-M-A-1/8-6-0-T-3?
Thank you for your inquiry Joeseph. Unfortunately, Part#: P-M-A-1/8-6-0-T-3 is not pressure rated.
Date published: 2022-12-22
What is the tolerance on the diameter of the probe? Specifically for the 3mm and 1/8 in varieties.
Thank you for your inquiry. The tolerance is ±0.001" for a 1/8" probe diameter.
Date published: 2022-03-21
What is the pressure rating for part number: P-M-A-1-8-3-1-4-T-3?
Hi Joseph,
Thank you for the inquiry. Please forward this question to TEMP@OMEGA.COM.
Best regards
OMEGA
Date published: 2022-10-31
what are the compliances? and certifications does these have. could not find the details here
Hi Mahesh,
This probe series does not include certification. NIST traceable certification is available as an option. Certification would follow standards described in following link;
https://www.omega.com/en-us/calibration-page
Best regards
OMEGA
Date published: 2023-04-06
what are the response times of these RTDs? I ordered a P-M-1/10-1/8-6-P-3
The response times for the P-M-1/10-1/8-6-P-3 are 0.9 seconds to get to 50% of response time in Water flowing at 3 feet per second and 7.5 seconds to 90% of the response.
Date published: 2021-11-02
how much self-heating error can once expect with 1mA excitation current with the 1/8" diameter probe? Conversely, what is the dissipation constant, E? Thanks.
Hi Moyar,
Thank you for the inquiry. Please forward these questions to TEMP@OMEGA.COM.
Best regards
OMEGA
Date published: 2022-07-29