Thermistor and Linear Temperature Probes

Models 6507E, 6535A

  • Overview

    The 6507 and 6535 temperature probes are designed for many applications of temperature measurement like air, water, soil, snow, ice, etc. They are fully sealed and can be used in fresh and sea water to a depth of 30 metres.
    The thermistor temperature probes use a negative temperature coefficient (NTC) thermistor as their temperature sensor. The NTC thermistor is a high quality, precision curve matched element. Its operating temperature is from
    -100°C to 150°C.

    Due to the type of cable being used, the measurement range of the standard thermistor temperature probe is from
    -30°C to 100°C. Accuracy of these probes is ±0.1°C making them ideally suited to measuring temperature profiles in water.

    The 6535 linear temperature probe is used for measuring temperatures between -17.8°C and 100°C. It outputs a DC voltage, the value of which is directly proportional to temperature.
    The linear temperature probes integrate the LM34 precision Fahrenheit temperature sensor whose output voltage is linearly proportional to the Fahrenheit temperature. Probe operates from 5V to 30V, does not require any external calibration or trimming to provide typical accuracies of ±11/2°F(°C) over a full -40°F (-40°C) to 240°F(115.5°C) temperature range. Due to the type of cable being used, the measurement range is ~-17.8°C to 100°C.

    The LM34 draws only 75µA from its supply so it has very low self-heating; furthermore it has low output impedance and linear output making interfacing of this probe very easy.

    environmental monitoring thermistor temperature probe 6507A
    environmental monitoring linear temperature probe 6535A

  • Specifications

    6507

    Physical specifications

    Material: Stainless steel tube epoxy sealed
    Size: Dia 6.40mm x 50mm long, different tube lengths available on request
    Weight: 350 grams

    Electrical specifications

    Temperature Range: -30°+100°C
    Temperature Accuracy: ±0.1°C

    Operating voltage: 5 VDC, from logger
    Typical current consumption: 0.5mA at 5VDC
    Outputs: 1 analog 0-2.55VDC
    Cable: 10m or 20m 2 core cable shielded. Other cable length available on request

    6535

    Physical specifications

    Material: Stainless steel tube epoxy sealed
    Size: Dia 8 mm x 100mm long, different tube lengths available on request
    Weight: 350 grams

    Electrical specifications

    Temperature Range: -17.8°+100°C
    Temperature Accuracy: ±1.5°C

    Operating voltage: 5 VDC, from logger
    Typical current consumption: 150µA at 5VDC
    Outputs: 1 analog 0-2120mVDC (18mV/°C)
    Cable: 10m or 20m 4 core cable shielded. Other cable length available on request

  • Ordering Information

    ModelDescription
    6507E-10Thermistor Probe with 10m of Cable 3KΩ @ 25°C
    6507E-20Thermistor Probe with 20m of Cable 3KΩ @ 25°C
    6535A-10Temperature Probe LM34 with 10m of Cable
    6535A-20Temperature Probe LM34 with 20m of Cable

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