AM1750 Secondary Reference PRT

AM1750 series Secondary Reference PRT provides our customers an affordable reference probe for precision temperature measurement and calibration in labs and fields. The PRT features accuracy of ±0.015°C at 0.01°C ; short term stability of ±0.007°C. Two different lengths of PRTs 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: ±0.015 °C at 0.01°C
Long term drift: ±0.01 °C
Short term stability: 0.007 °C
Durable and shock resistance
Temperature Coefficient 0.003925
Inconeltm sheath
Customized dimensions available


    Temperature Range
    1750-12: -200°C to 670°C
    1750-20: -200°C to 670°C
    Resistance at 0 °C
    Nominal 100 Ω
    Temperature Coefficient
    0.003925 Ω/ Ω/°C
    ±0.025°C at -196 °C
    ±0.015°C at 0.01 °C
    ±0.035°C at 420 °C
    ±0.05°C at 660 °C
    ±0.01°C at 0 °C after 100 hours at 660 °C
    Short Term Stability
    Thermal Shock
    ±0.005°C after 10 times thermal cycles from minimum to maximum temperatures
    50 mW/°C
    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
    32 mm
    Sensor Location
    5 mm from tip
    Insulation Resistance
    >1000 MΩ at room temperature
    Sheath Material
    1750-12: 0.25 inch X 12 inch (6.35 mm X 305 mm)
    1750-20: 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
    1750-12-T, PRT with NIST traceable calibration and data
    1750-20-T, PRT with NIST traceable calibration and data
    NVLAP – Accredited Calibrations available per request

  • Optional Accessories

    Carrying Case for 1750-12
    Carrying Case for 1750-20

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    TypeStandard BathCustom Bath

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