Omega Engineering PR-11 RTD Probe

Overview

The Omega Engineering PR-11 is a small-diameter, general-purpose RTD probe built around a Class A platinum PT100 sensing element, designed for accurate temperature measurement in liquid and air process applications. With a slim 1/16 inch sheath diameter, transition-style construction, and metal strain relief, the PR-11 fits into space-constrained thermowells and process fittings where a bulkier probe would not, while still delivering laboratory-grade Class A accuracy conforming to IEC 60751.

As the official authorized partner and exclusive regional representative for Omega Engineering, Seven Star LLC proudly supplies the PR-11 RTD probe to industrial facilities, laboratories, and process engineering contractors across the Sultanate of Oman and the wider GCC. Every unit shipped through Seven Star LLC carries full manufacturer specifications, genuine calibration documentation, and access to regional technical support, giving buyers in Muscat and beyond the confidence of authentic Omega Engineering equipment backed by local stock and service.

Operating Principle

The Omega Engineering PR-11 measures temperature using the well-established resistance temperature detector principle: a wire-wound platinum element changes its electrical resistance in a precise, repeatable relationship with temperature, following the standard 0.00385 Ω/Ω/°C alpha coefficient defined by IEC 60751. As the probe’s sensing tip warms or cools, an instrument measuring the resistance across the two, three, or four lead wires converts that resistance value directly into a highly accurate temperature reading, typically achieving Class A accuracy of ±0.15°C at 0°C.

Because platinum RTD elements are inherently more stable and linear over time than thermocouple junctions, the PR-11 delivers consistent readings across repeated thermal cycling without the drift or cold-junction compensation errors associated with thermocouple-based measurement. For process engineers, this translates into dependable long-term calibration stability, straightforward integration with standard 2-, 3-, or 4-wire RTD input instrumentation, and confidence that a reading taken today will match one taken months from now under the same process conditions.

Engineering Design of the Omega Engineering PR-11

The Omega Engineering PR-11 is constructed with a 304 stainless steel sheath as small as 1/16 inch in diameter, available in standard lengths from 6 to 24 inches, with custom lengths available to match specific thermowell or immersion depth requirements. The sensing element sits at the probe tip, connected through 26 AWG stranded, nickel-plated copper lead wires insulated with PFA for chemical and thermal resistance, terminating in a transition-style junction with a metal strain relief that protects the delicate lead wire connection point from mechanical stress during installation and service.

An epoxy-sealed transition end keeps moisture out of the wire junction, though the transition itself is rated only to 260°C and is not intended for direct liquid immersion, so installation should route the transition point outside the heated or wetted zone. Multiple connector options, including MTP, OTP, and TA3F-TA4F styles, allow the PR-11 to be matched directly to common handheld and panel-mount temperature instruments, and an optional stainless steel overbraid is available where the lead wire requires additional mechanical or abrasion protection in harsh installation environments.

Key Features

The Omega Engineering PR-11 combines compact dimensions with laboratory-grade measurement accuracy. The Omega Engineering PR-11 key features include:

• Uses a wire-wound platinum PT100 sensing element with Class A accuracy of ±0.15°C at 0°C, conforming to IEC 60751.
• Measures across a wide temperature range from -200°C to 600°C, depending on the specific PR-11 model variant selected.
• Features a slim 1/16 inch diameter 304 stainless steel sheath suited to space-constrained thermowells and fittings.
• Is available with 100Ω standard or optional 1000Ω resistance at 0°C to match instrumentation requirements.
• Supports 2-, 3-, or 4-wire configurations for compatibility with a wide range of PLC, DCS, and handheld temperature instruments.
• Terminates in a transition-style junction with metal strain relief for reliable field wiring and mechanical protection.
• Offers multiple connector options, including MTP, OTP, and TA3F-TA4F, for direct compatibility with common test instruments.
• Is available with optional stainless steel overbraid for additional lead wire protection in harsh industrial environments.

Industrial Applications

The Omega Engineering PR-11 is widely used for process temperature monitoring in pharmaceutical manufacturing, food and beverage processing, HVAC systems, and laboratory environments where compact probe dimensions and Class A accuracy are both required. In the Sultanate of Oman and across the GCC, industrial facilities and quality control laboratories rely on small-diameter RTD probes like the PR-11 to monitor process temperatures in tight thermowells, jacketed vessels, and instrumentation panels where a larger probe would not fit.

As the officially authorized partner for Omega Engineering, Seven Star LLC distributes the PR-11 to district cooling plants, hospitality and hospital HVAC systems, and industrial facilities operating within the Sohar and Salalah economic free zones, where accurate temperature feedback supports both energy efficiency and process quality control. Oil and gas support facilities, power generation plants, and chemical processing operators across the region also depend on the PR-11’s stable, drift-resistant platinum element for critical process temperature validation and calibration traceability.

Technical Specifications

The table below summarizes the core technical specifications of the Omega Engineering PR-11, confirming why the Omega Engineering PR-11 is specified across regional temperature measurement projects.

Request a Quote for Omega Engineering PR-11 RTD Probe

Seven Star LLC invites laboratories, industrial facilities, and procurement teams across Oman and the GCC to submit a formal RFQ for the Omega Engineering PR-11 RTD probe. Regional warehouse stock allows for fast delivery, and our instrumentation division can provide the full technical datasheet, connector selection guidance, and probe-length sizing support to match your exact thermowell or immersion requirement. As the authorized partner for Omega Engineering in Oman and the GCC, Seven Star LLC guarantees genuine equipment, manufacturer specifications, and dedicated local technical support — contact our team today to request a quotation or arrange a technical consultation.