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If you want a very stable thermometer from –200 °C to 670 °C and are particular about the calibration, then look no further than the 5609 Secondary Reference PRT. Its short-term stability at the triple point of water is only ± 7 mK and its one-quarter inch (6.23mm) diameter lets you get accurate measurements in only 100 mm of immersion.
The 5609 comes with a one-quarter inch (6.35 mm) diameter sheath in lengths of 12 inches, 15 inches, and 20 inches, or with a 6 mm diameter in lengths of 300 mm, 400 mm, or 500 mm.
When looking for improved response time and reduced stem effect in shallow immersion, look for small diameter probes, because the measurement error called stem effect is caused by the diameter of the stem rather than the length of the stem.
- –200 °C to 670 °C (100 mm minimum immersion)
- Dry-well reference with 90 ° bend
- 20 in x 1/4 in
- lead wire (cable) 6 ft
- banana plugs
