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    RTD Sensor with transmitter, Pt100, 2 Wire

    RTD sensor built-in small transmitter. It converts temperature to 4-20mA standard signal proportional to the electrical signals of thermistor, and outputs to display instrument or DCS system in control room. Transmitter adopts silicone rubber seal structure, good anti-interference ability, shock and humidity, apply to harsh environments. Measuring temperature range -200~+420 ℃.
    Free Shipping Worldwide
    Delivery date: 6-12 days

    RTD sensor built-in transmitter can directly provide accurate input signal of temperature changes for display instruments, recording instruments, signal conditioners, scanister and computer.


    1. RTD temperature range and accuracy chart

    Type of sensing element Measuring range Allowable deviation Δt
    Pt100 -200~420℃ Class B (-200~800℃) Permissible deviation ±(0.30+0.005|t|)
    Class A (-200~650℃) Permissible deviation ±(0.15+0.002|t|)
    Cu50 -100~150℃ -50~100℃ Permissible deviation ±(0.30+6.0*10-3t)

    Note: t is the actual measuring temperature absolute value of the temperature sensing element.
    2. Transmitter parameter chart

    Input Platinum thermistor: PT100, PT1000
    Output 4-20mA
    Intrinsic error ±0.2%, ±0.5%
    Transmission mode 2 wire
    Supply voltage DC 12~35V, rated voltage DC 24V
    Load resistance 0~600Ω (DC 24V), rated load 250Ω
    Temperature influence ≤0.05/1℃
    Working environment Temperature: -25~+80℃, humidity: 5%~95%, mechanical vibration: f≤55Hz, amplitude<0.15mm
    Display 3 1/2digital display or LCD display

    3. Meter and protection head type (unit: mm)
    RTD sensor meter and protection head type

    4. Selection chart

    Type of sensing element Meter type Installing form Mode of connection Thermowell diameter Thermowell total length
    T4: Pt100;
    T6: Pt1000
    P0: No meter;
    P2: Meter with digital display;
    P4: Intelligent meter with digital display
    I1: No fixed device;
    I2: Fixed card sets of thread joint;
    I3: Movable card sets of thread joint;
    I4: Fixed card sets of flange;
    I6: Taper thermowell and fixing thread
    C3: Standard waterproof protection head;
    C4: Explosion-proof protection head
    D0: Φ16mm;
    D1: Φ12mm

    Note: The sensing element is sheath RTD sensor, thermowell material is stainless steel, and circuit adopts non-isolated type. When ordering products, write the thermowell insertion depth l and the corresponding temperature range for output 4~20mA signal you need.
    Tips: Connection methods of Pt100 RTD sensor
    Pt100 RTD sensor usually has two-wire and three-wire connection methods. The two-wire connection is to connect a wire to both ends of thermistor. This connection method is simple with low cost. But it will bring additional error as the lead resistance becomes one arm of the bridge. Although with each change of 10 degrees centigrade, PT100 only changes 0.39 ohms. But the lead wire of industrial field thermistor is usually long and the lead resistance will certainly affect the result of the measurement. Therefore, Pt100 of two-wire connection is only suitable for short distance application. It is necessary to use three-wire connection in the application of long distance. The three-wire connection is to lead one line at one end of thermistor and the other two lines are led at another end. When the thermistor matches with the measuring bridge, lead resistance is connected to two arm of the bridge circuit, which eliminates the influence of the lead resistance and improves the measurement accuracy.

    In this video, ATO will show you how to use RTD PT100 with transmitter and temperature controller to measure temperature.

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