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    อุปกรณ์วัด Control System (pH Transmitter with 4-20 mA Galvanically Isolated Output)

    HI 8614N

    pH Transmitter with 4-20 mA Galvanically Isolated Output

    The HI 8614N is a water-resistant pH transmitter is designed to be used with a standard high impedance pH probe with BNC connector. The signal is then processed by a special high-impedance amplifier, which transmits an output current directly proportional to the input signal but independent of changes in load or cable capacitance.

    Calibration is performed by the adjustment of two independent trimmers — slope and offset.

    Temperature compensation is performed by the transmitter’s ATC (Automatic Temperature Compensation) circuitry when measurements are taken with a temperature probe attached; if ATC is not required, it is also possible to substitute a fixed resistor for the temperature probe. The transmitter can be connected to HANNA controller
    HI 8510, HI 8710 or HI 8711, recorders, computers or any data monitoring device that accepts 4 to 20 mA input.


    Range  0.00 to 14.00 pH; 4–20 mA
    Accuracy @ 20°C  ±0.02 pH; ±0.02 mA
    Calibration  offset: ±2 pH; ±2.2 mA; slope: 86 to 116%; ±0.5 mA
    Compensation  fixed or automatic from 0 to 100°C (32 to 212°F) with HI 76608 probe
    Input Impedance  1012 Ohm
    Recorder Output  4-20 mA (isolated)
    Protection  IP65
    Power Supply  18-30 VDC
    Load  max 500 Ohm
    Environment  0 to 50°C (32 to 122°F); RH max 95% non-condensing
    Dimensions  165 x 110 x 71 mm (6.5 x 4.3 x 2.8’’)
    Weight  1 kg (2.2 lb.)


    HI 7004L  4.01 pH Buffer Solution
    1 x 500 mL bottle
    HI 7007L  7.01 pH Buffer Solution
    1 x 500 mL bottle
    HI 7010L  10.01 pH Buffer Solution
    1 x 500 mL bottle
    HI 6054B  Electrode Holder for In-line Installation, 3/4x16UNF Thread
    HI 931002  4-20 mA Amperometer, Simulator and Calibrator
    HI 931001  pH and mV Precision Simulator

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    Tel.  02-191-3928 Fax 02-191-3929

    For more information please contact 081-847-6768 (Ms. Nareerat) IDLine: @alltestkit

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