The Pyromation Spring-Loaded RTD/Thermowell Assemblies with Connection Heads are Pt100 sensor assemblies designed for use with various thermowell types in process temperature applications. Their 1/4″ spring compression mechanism ensures reliable thermowell contact for consistent thermal measurements.
Technical Specifications
- Manufacturer: Pyromation
- Configuration Code: GP03
- Product Type: Spring-Loaded RTD/Thermowell Assembly with General-Purpose Connection Head
- Sensor Type: 100 Ω Platinum RTD (α = 0.00385 °C⁻¹), 2-, 3-, or 4-wire
- Sheath Material: 316 Stainless Steel (3/16″ or 1/4″ O.D.)
- Connection Heads:
- Aluminum, cast iron, polypropylene, or 316L stainless steel screw-cover
- flip-top aluminum
- Temperature Range: −328 °F to 1112 °F (−200 °C to 600 °C), varies by element
Pyromation GP-3 Ordering Guide
Part numbers span seven code segments: RTD element/tolerance, sheath diameter, wire configuration, thermowell part number or 3-digit “S” length, element option, head mounting fitting, head termination, and options.
Example Order Number
R1T185L 48 3 – [TW#] – SL – 8HN 31, T-
Grade B Pt100 • 1/4″ Sheath • 3-wire • Thermowell P/N • Spring-Loaded • 316SS Hex Nipple • Aluminum Screw-Cover Head • Transmitter
Part Number Code Reference
Click to expand/collapse
| Single | Duplex | Tolerance |
|---|---|---|
| Low Range Wire Wound (−200 to 200) °C | ||
| R1T185L | R1T285L | Grade B |
| R5T185L | R5T285L | (1/5) Class B |
| Low Range Thin Film (−50 to 200) °C | ||
| RBF185L | RBF285L | Class B |
| RAF185L | RAF285L | Class A |
| High Range Wire Wound (−200 to 600) °C | ||
| R1T185H | R1T285H | Grade B |
| RAT185H | RAT285H | Class A |
Refer to RTD tolerance information in the General Information section for calculations to determine specific tolerance at temperature.
| Code | Diameter (inches) |
|---|---|
| 38 | 3/16 |
| 48 | 1/4 |
| Code | Description |
|---|---|
| 2 | 2-wire element |
| 3 | 3-wire element |
| 4 | 4-wire element — not available in duplex or with 440 Series Transmitter |
| Code | Description |
|---|---|
| [TW P/N] | Select thermowell part number from Thermowell Section |
| [3-digit] | Specify 3-digit “S” length in inches if no thermowell is required |
| Code | Description |
|---|---|
| SL | Spring-loaded element — not available with option 35T-642A |
| SC | Self-contained spring-loaded element |
| SN | Self-contained spring-loaded element with Buna-N oil seal — 121 °C [250 °F] / 100 PSI max. |
| Code | Description | Material |
|---|---|---|
| 6HN | 1/2″ × 1/2″ NPT hex nipple, 1″ length | Steel |
| 6PN_ | 1/2″ NPT pipe nipple (specify “E” length in inches) | Steel |
| 6PU_ | 1/2″ NPT union/nipple (specify “E” length in inches) — 4″ minimum length required | Steel |
| 8HN | 1/2″ × 1/2″ NPT hex nipple, 1″ length | 316 SS |
| 8PN_ | 1/2″ NPT pipe nipple (specify “E” length in inches) | 316 SS |
| 8PU_ | 1/2″ NPT union/nipple (specify “E” length in inches) — 4″ minimum length required | 316 SS |
| Code | Description |
|---|---|
| 22 | 3″ individual Teflon® leads with terminal pins |
| 31 | Aluminum screw-cover head |
| 34 | Cast iron screw-cover head |
| 35T-642A | (4 to 20) mA HART® Field Transmitter with aluminum general-purpose housing |
| 49 | Flip-top aluminum head |
| 63 | White polypropylene screw-cover head |
| 91 | 316L stainless steel screw-cover head |
| Code | Description |
|---|---|
| W | Epoxy coating — available with option 31 only |
| GS | Ground screw |
| I | Stainless tag |
| NB | 1/2″ NPT nylon conduit reducer bushing |
| SB | 1/2″ NPT conduit reducer bushing |
| T-440 | (4 to 20) mA head-mounted RTD transmitter |
| T-441 | (4 to 20) mA isolated head-mounted transmitter |
| T-442 | (4 to 20) mA isolated HART® head-mounted transmitter |
See transmitter ordering information in back of section.
Series Information
Pyromation Spring-Loaded RTD / Thermowell Assemblies with Connection Heads (PDF)
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