Overview
| brand | Shanghai Automation Instrument | type | High temperature assembly thermocouple |
| Thermocouple category | Platinum rhodium 30- Platinum rhodium 6 | Code | WRR |
| Graduation | B | range | 0 ℃~1800 ℃ |
| Basic error limit | ± 0.25% t | Thermal inertness level | I |
| producing area | Shanghai | customization | yes |
| quantity | nine hundred and ninety-nine | ||
Product Details
Product name: High temperature assembled thermocouple
Specifications: ф 12~ ф 30 mm
Product note: If users have special requirements, they can indicate them in the order contract.
Product category: Thermocouples
According to national regulations, our company produces assembled thermocouples that comply with IEC international standard graduation numbers, such as platinum rhodium 30-platinum rhodium 6, platinum rhodium 10-platinum, nickel chromium nickel silicon, nickel chromium constantan, etc.
High temperature assembly thermocoupleUsually composed of main components such as temperature sensing components, installation fixtures, and junction boxes.
Measurement range and allowable error range
Thermocouple category | Code | Graduation | measuring range | Basic error limit |
Nickel chromium constantan | WRK | E | 0-800 ℃ | ± 0.75% t |
Nickel chromium nickel silicon | WRN | K | 0-1300 ℃ | ± 0.75% t |
Platinum Rhodium 13 Platinum | WRB | R | 0-1600 ℃ | ± 0.25% t |
Platinum Rhodium 10 Platinum | WRP | S | 0-1600 ℃ | ± 0.25% t |
Platinum Rhodium 30 Platinum Rhodium 6 | WRR | B | 0-1800 ℃ | ± 0.25% t |
Note: t is the measured temperature value of the temperature sensing element (℃)
Thermocouple time constant
Thermal inertness level | Time constant (seconds) | Thermal inertness level | Time constant (seconds) |
I | 90-180 | III | 10-30 |
II | 30-90 | IV | <10 |
Thermocouple nominal pressure: generally refers to the static external pressure that the protective tube can withstand and rupture at working temperature.
The minimum insertion depth of thermocouples should not be less than 8-10 times the outer diameter of their protective sleeve (except for special products)
Insulation resistance: When the ambient air temperature is 15-35 ℃ and the relative humidity is less than 80%, the insulation resistance is ≥ 5 megaohms (voltage 100V). Thermocouples with splash proof junction boxes have an insulation resistance of ≥ 0.5 megaohms (voltage 100V) at a relative temperature of 93 ± 3 ℃
Insulation resistance at high temperatures: The insulation resistance (measured per meter) between the thermal electrode (including the double branch type) and the protective tube and the double branch thermal electrode of a thermocouple at high temperatures should be greater than the values specified in the table below.
Prescribed long-term use temperature (℃) | Test temperature (℃) | Insulation resistance value (Ω) |
≥ 600 | six hundred | seventy-two thousand |
≥ 800 | eight hundred | twenty-five thousand |
≥ 1000 | one thousand |