AccuMac AM1850-100 SPRT, 100 Ω, -200 to 500 °C
AccuMac AM1850-100 SPRT, 100 Ω, -200 to 500 °C
AccuMac AM1850-100 SPRT
Overview
The AccuMac AM1850-100 is a standard platinum resistance thermometer (SPRT) designed to interpolate temperature on the ITS-90 scale from -200 to 500 °C. It is widely used as the reference thermometer in secondary laboratories and as the standards probe for dry-well calibrators and stirred temperature baths.
The 480 mm probe uses an Inconel 600 sheath instead of quartz glass for better durability, with a special capsule that protects the platinum sensing wire from metal-sheath contamination at high temperature. All parts are cleaned and heat treated before assembly and the fill gas is controlled to minimize oxidation, keeping drift below 0.008 °C per year in typical use.
Features
- Temperature range -200 to 500 °C
- 100 Ω nominal resistance
- Fully meets ITS-90 criteria for standard thermometers
- Repeatability better than 0.0015 °C
- Low drift: less than 0.002 °C at TPW after 100 hours at 500 °C
- Inconel 600 sheath, 6.35 mm OD x 480 mm long
- ISO/IEC 17025 accredited calibration included, gold-plated spade terminations and wooden carrying case
Applications
- Reference thermometer for dry-well block calibrators
- Standards probe for stirred temperature calibration baths
- ITS-90 interpolation in secondary calibration laboratories
AccuMac AM1850-100 SPRT Technical Specifications
| Product type | Standard platinum resistance thermometer (SPRT) |
| Temperature range | -200 to 500 °C |
| Nominal resistance | 100 Ω (RTP/R0 = 100) |
| Repeatability | <0.0015 °C |
| Drift at TPW | <0.002 °C after 100 hours at 500 °C; <0.008 °C/year typical |
| Sheath material | Inconel 600 |
| Sheath dimensions | 6.35 mm OD x 480 mm length |
| Sensor length | 42 mm |
| Calibration | ISO/IEC 17025 accredited calibration included |
| Terminations | Gold-plated spade lugs |
| Carrying case | 9002 wooden case included |
Manufacturer information: AccuMac AM1850 series on accumac.com