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Accumac / Probe / AM1760/1762 Secondary SPRTs

AM1760/1762 Secondary SPRTs

· Rtpw Drift < 19 mK after 500 hours

· Accuracy ±0.006 °C at 0.01 °C

· Temperature range: -200 °C to 670 °C

· Customized dimensions available

AM1760 series Secondary Standard PRT provides our customers an affordable SPRT alternative for precision temperature measurement and calibration in labs and fields. This SPRT features accuracy of ±0.006°C at 0.01°C , short term stability of ±0.002°C and very low drift rate of less than 19 mK after 500 hours. Two different lengths of SPRTs are available at 12-inch and 20-inch.

The sensing element is designed to protect the platinum sensing wire from contamination at high temperatures, giving the device a high level of stability and repeatability in performance. A uniquely designed support structure and filling material provides excellent balance between the hysteresis effect, mechanical shock and thermal shock performance. This high performance probe fully meets ITS-90 criteria for reference thermometers.


· Temperature range: -200 °C to 670 °C

· Accuracy: ±0.006°C at 0.01°C

· Long term drift: ±0.019°C

· Short term stability: 0.002 °C

· Temperature Coefficient 0.003925

· W(Ga)>=1.11807

· Inconeltm sheath

· Customized dimensions available

Temperature Range -200°C to 670°C
Resistance at 0 °C 1760 - Nominal 100 Ω
1762 – Nominal 25 Ω
Temperature Coefficient 0.003925 Ω/ Ω/°C
Accuracy ±0.007°C at -196 °C
±0.006°C at 0.01 °C
±0.015°C at 420 °C
±0.025°C at 660 °C
Drift* ±0.004°C at 0 °C after 100 hours at 660 °C
Short Term Stability ±0.002°C
Thermal Shock ±0.002°C after 10 times thermal cycles from minimum to maximum temperatures
Self-heating 0.0015 °C at 1 mA current
Response Time 9 seconds for 63% response to step change in water moving at 3 feet per second
Measurement Current 0.5 mA or 1 mA
Sensor Length 42 mm
Sensor Location 5 mm from tip
Insulation Resistance >1000 MΩ at room temperature
Sheath Material Inconeltm
Dimension 1760/1762-12: 0.25 inch X 12 inch (6.35 mm X 305 mm)
1760/1762-20: 0.25inch X 20 inch (6.35 mm X 500 mm)
External Leads Teflontm –insulated copper wire, 4 leads, 2.5 meters
Handle Dimension 15mm (OD) X 65 mm (L)
Handle Temperature Range** -50°C to 180°C
Calibration Options 1760/1762-12-T, Secondary SPRT with NIST traceable calibration and data 1760/1762-20-T, Secondary SPRT with NIST traceable calibration and data

Model Description
9001 Wooden Carrying Case for 1760/1762-12
9002 Wooden Carrying Case for 1760/1762-20