Technical Information
Slot Resistance Thermometer NWT-ST / ZS
| [1] Measuring resistors | 1 or 2 measuring resistors |
| Temperature sensor | measuring wire with bifilar winding |
| [2] Rated resistance at 0° | 100 Ω |
| Resistance material | platinum (Pt) optionally: nickel (Ni), copper (Cu) |
| TEL | approx. 2/3 of sensor length |
| Recommended measuring current | 0.3mA … 1.0mA |
| Max. Voltage | 60V |
| Sensor insulation | fine mica, resin impregnated glass fibre coating |
| [3] Tolerance class | according to EN 60751 |
| [4] Mode of connection | 2- // 3- // 4- conductor connection |
| [5] Dimensions | |
| Thickness | 2.0 mm – 8.0 mm ± 0.3 mm |
| Width | 7.0 mm – 20 mm ± 0.3 mm |
| Length | 75 mm – 500 mm ± 5 mm |
| [6] Connection line | |
| E1 | single litz wires |
| A1 | shielded single litz wires |
| Sx | shrinkable tubing with x single litz wires |
| Gx | shielded shrinkable tubing with x single litz wires |
| FSLx | flat band shrinkable tubing with x single litz wires |
| Insulation | PTFE |
| Cross section | ≥AWG30 |
| Shield | as requested by customer |
| Cable end | bare // tinned // wire end sheathes |
| [7] Cable length | specification of connection line / ground wire length in mm |
| Color code | according to EN 60751 // as requested by customer |
| [8] Dielectric strength | max. 5 kV / AC 50 Hz / 1 min. |
| [9] Measuring range | -40°C ... +180°C |
| [10] Ex-approval | |
| IECEx | Ex eb IIC |
| Ex ta IIIC | |
| Ex ia IIC Gb | |
| Ex ia IIIC Gb | |
| ATEX | II 2G Ex e IIC Gb |
| II 2D Ex ta IIIC Da | |
| II 2G Ex ia IIC Gb | |
| II 2D Ex ia IIIC Db | |
| TR | Ex ia IIC U |
| Ex e II U | |
| Ex ia IIIC Db U | |
| Ex tb IIIC Db U |
Tolerance class
| Unit | Class AA | Class A | Class B | Class C | Class D |
| [Ω] | ±0.04 Ω / 0°C | ±0.06 Ω / 0°C | ±0.12 Ω / 0°C | ±0.30 Ω / 0°C | ±0.50 Ω / 0°C |
| [°C] | ±0.10°C / 0°C | ±0.15°C / 0°C | ±0.30°C / 0°C | ±0.80°C / 0°C | ±1.30°C / 0°C |
Example for order code / Product description
| [1] | [2] | [3] | [4] | [5] | [6] | [7] | [8] | [9] | [10] | |
| NWT-ST/ZS | 1 | Pt100 | A | 3 | 2x10x200 | E1 | 2000 | 2.5 | 180 | |
| NWT-ST/ZS | 2 | Pt100 | B | 2 | 3x10x300 | S4 | 5000 | 2 | 200 |