Model 935-14-77 Standard Platinum Resistance Thermometer. Temperature range -50°C to 670°C.
Model 935-14-77 SPRT, is the metallic sheathed version of the Model 909, the workhorse of calibration
laboratories all over the world.
The resistance element is of pure platinum, coiled and mounted in a strain free construction.
The former is of pure alumina material and all parts have been pre-aged to eliminate contamination and
strain.
Standard PRT Thermometer.
| Model | Description |
|---|---|
| 935-14-77 | SPRT Thermometer Range -200 to +670°C |
All joints are welded to minimize resistance changes. The leads are brought to a handle assembly
where
they are connected to a low loss cable, 6 feet long and screened.
The thermometer sheath is of metallic material which is filled with dry air during construction.
It is available in a standard length of 450mm.
they are connected to a low loss cable, 6 feet long and screened.
The thermometer sheath is of metallic material which is filled with dry air during construction.
It is available in a standard length of 450mm.
The model 935-14-77 is supplied with a calibration certificate giving RTPW and Wga,
plus a
comprehensive handbook.
For transportation and storage the SPRT is supplied in its own attractive carrying case.
Please Note: The incanol sheath ensures that the 935-14-77 will not break.
However, internally it has the same construction as a standard platinum resistance thermometer
and must be handled accordingly.
comprehensive handbook.
For transportation and storage the SPRT is supplied in its own attractive carrying case.
Please Note: The incanol sheath ensures that the 935-14-77 will not break.
However, internally it has the same construction as a standard platinum resistance thermometer
and must be handled accordingly.
Standard PRT
| Model | 935-14-77 |
| Measuring Range | -50°C to 670°C |
| Nominal Resistance | 25.5Ω at 0°C |
| Recommended
Maximum Current |
1mA |
| Nominal Sensitivity | 0.1Ω/°C |
| Resistance Ratio | Wga ≥ 1.11807 as required by ITS-90 |
| Self-Heating | 1mK/25 microwatts |
| Sealed-In Gas | Dry air |
| Stability | Depends upon the temperature range of
use. Typical annual stability, see table above |
| Internal Leads | 4 wire-platinum |
| External Leads | Silver-plated multistrand wires in a
low-loss insulation cable terminating in gold-plated terminals. |
| Length | 450mm |
| Nominal Diameter | 6mm |