The RT7 RTD assembly is a resistance temperature detector designed for use in hazardous locations. The RT7 is a customizable product that is model number configured and made to order. The RT7 consists of a stainless steel RTD sensor, complete with a connection head (enclosure) that may be provided with a terminal block, DIN rail, wire splice connectors, or internal transmitter. Connection extension fittings will spring load the sensor into a thermowell or a fixed fitting can be used without a thermowell.
RT7 – Standard RTD Assembly
RT7 standard RTD assembly built for precise temperature sensing and dependable performance in a wide range of industrial environments.
Additional information
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Configurations
RT7 RTD Assembly Model Code
| RT7 | – | T1 | – | T2 | – | T3 | – | T4 | – | T5 | – | T6 | – | T7 | – | T8 | – | T9 |
|---|
| T1 | Connection Head | Color | Material | Conduit Connection | Terminal Block | Type Rating |
|---|---|---|---|---|---|---|
| 2ALT | Standard style | Blue | Aluminum epoxy coated | 1x 3/4″ NPT | Bakelite | Type 4X |
| 1ALT | Standard style | Blue | Aluminum epoxy coated | 1x 1/2″ NPT | Bakelite | Type 4X |
| 2ALTC | Standard style | Blue | Aluminum epoxy coated | 1x 3/4″ NPT | Ceramic | Type 4X |
| 2ALW | Mounting holes | Grey | Aluminum epoxy coated | 1x 3/4″ NPT | Bakelite | Type 4X |
| 2ALM | Multi connection | Blue | Aluminum epoxy coated | 2x 3/4″ NPT | Bakelite | Type 4X |
| 2AL | Standard style | Grey | Aluminum | 1x 3/4″ NPT | Bakelite | Type 4 |
| 2SS | Standard style | Steel | Stainless steel | 1x 3/4″ NPT | Bakelite | Type 4X |
| Note | Refer to RT7 – Standard RTD Assembly Specifications (PDF) for additional options, details and other styles | |||||
| T2 | Connection Extension | Material | CSA Note |
|---|---|---|---|
| N | Nipple 1/2″ NPT | Galvanized | Thermowell required for hazardous rating |
| SN | Nipple 1/2″ NPT | Stainless Steel | |
| NUN | Nipple-union-nipple 1/2″ NPT | Galvanized | |
| TX | Spring loaded fitting 1/2″x1/2″ NPT | Stainless Steel | |
| TXUN | Spring loaded fitting-union-nipple | Galvanized | |
| SNUN | Nipple-union-nipple 1/2″ NPT | Stainless Steel | Canada only, Thermowell required for hazardous rating |
| STXUN | Spring loaded fitting-union-nipple | Stainless Steel | |
| FS | Fixed bushing 1/2″x1/2″ NPT | Stainless Steel | CSA process pressure rating ≤ 34.4 MPa @ +20°C (5000 psi @ +68°F) |
| FX | Fixed hex instrument fitting 1/2″ NPT | Stainless Steel | CRN process pressure rating ≤ 25.5 MPa @ +20°C (3700 psi @ +68°F) |
| T3 | Connection Extension “A” length (inches) | Connection Extension (T2) Options | CSA Rating |
|---|---|---|---|
| X | Fixed length for T2 options FS, FX, TX | FS, FX, TX | -50°C to +50°C (-50°F to +122°F), T6 |
| 0.5 | Clearance fit | N, SN | -50°C to +50°C (-50°F to +122°F), T6 |
| 1.5 | 1″ installed length | N, SN | -50°C to +200°C (-50°F to +392°F), T4A |
| 3.5 | 3″ installed length | N, NUN, TXUN, SN, SNUN, STXUN | -50°C to +230°C (-58°F to +446°F), T3C |
| 4.5 | 4″ installed length | N, NUN, TXUN, SN, SNUN, STXUN | -50°C to +230°C (-58°F to +446°F), T3C |
| 8.5 | 8″ installed length | SN, SNUN, STXUN | -50°C to +450°C (-58°F to +842°F), T2 |
| “inches” | Installed length is the fitting length minus approximately 1/2 inch for thread engagement. | ||
| T4 | Element Type | |
|---|---|---|
| A | 100Ω Pt. 385 Class A (Class A tolerance ≤ +300°C (+572°F), Class B tolerance typically applies >+300°C (+572°F)) | |
| B | 100Ω Pt. 385 1/10 Class B (1/10 DIN; tolerance typically applies ≤ +300°C (+572°F)) | |
| C | 100Ω Platinum 392 | |
| D | 120Ω Nickel 627 0.806Ω/°C | |
| E | 10Ω Copper 427 0.039Ω/ °C | |
| F | 1000Ω Pt. 385 Class A | |
| T5 | Number of Elements |
|---|---|
| S | Single element |
| D | Dual element |
| T6 | Lead Wire Configuration |
|---|---|
| 2 | 2 Wire |
| 3 | 3 Wire |
| 4 | 4 Wire |
| T7 | Sensor Probe Construction | Notes |
|---|---|---|
| LT | Low temperature (-50 to +260°C) (-58°F to +500°F) | Temperature values are for the RTD temperature sensor probe construction only. The CSA process and ambient temperature assembly ratings are dependant on connection head (T1), connection extension type and length (T2 & T3), as well as the thermowell or fixed fitting it is connected to. |
| HT | High temperature (-50 to +482°C) (-58°F to +899°F) | |
| ET | Extreme temperature (-50 to +850°C) (-58°F to +1562°F) | |
| VT | Vibration construction (-50 to +482°C) (-58°F to +899°F) | |
| CT | Cryogenic temperature (-200 to +260°C) (-328°F to +500°F) |
| T8 | Sensor “L” Length (inches) |
|---|---|
| “inches” | Specify length in inches |
| T9 | Sensor Sheath Diameter |
|---|---|
| 18 | 1/8″ (0.125″) |
| 36 | 3/16″ (0.188″) |
| 14 | 1/4″ (0.250″) |
| 38 | 3/8″ (0.375″) |
Downloads & Resources
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