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Differential pressure transmitter

Update: 2014/6/14      View:
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  Series intelligent capacitive pressure, differential pressure transmitter is referring to the domestic and foreign advanced technology, development and production of the product itself. The core components of quality products abroad, after years of production practice, its performance and quality reliability has reached the leading domestic level, widely used in petroleum, chemical, metallurgy, electric power, papermaking, pharmaceutical, textile and other sectors of the differential pressure, pressure, liquid level, flow rate measurement of the process parameters.

  The details of the HD-PR series pressure sensor

  Product features:

    High precision, good stability, transmitter δ chamber through special design, make the work volume change is less than 0.16cm3. Can prevent the measured temperature or pressure medium change caused by the additional error

    Specification complete, including differential pressure, differential pressure, static pressure, high pressure, absolute pressure, liquid level transmitters

    The complete machine has no mechanical moving parts, reduces the failure rate, and easy to repair

    The metal sealing δ chamber as sensing element, eliminates the mechanical shock resistance, anti vibration transmitter is poor, also avoided by external stress or torque caused by error

    Terminal transmitter and amplifying circuit is placed in the upper part of the sealed transmitter electrical room, to ensure the reliability of the transmitter in bad environment.

    The amplifier circuit with reverse polarity protection and overload protection circuit, which can prevent the wiring error caused by the transmitter damage

    The liquid membrane using 316L, tantalum, Hastelloy, Monel and other anti-corrosion materials, suitable for measuring the corrosive medium

    ★ can be equipped with remote seal device, to avoid the medium to be measured directly in contact with the transducer diaphragm

    Range, zero external continuously adjustable, positive transfer up to 500% of full scale, negative transfer of up to 600%

    The output signal in accordance with the HART bus protocol, and protocol of HART bus equipment interconnection

  Technical performance:

    ◆ use object:Liquid, gas or steam

    ◆ measurement range: see selection specifications the output signal: 4 ~ 20mAVDC. stack HART protocol for digital signal

    ◆ electric source: the external power 24VDC. (power supply range of 12V to 45V) the performance index (in the absence of migration, 316 stainless steel diaphragm and other standard test conditions.)

    ◆ range ratio: 40:1

    ◆ precision: range is 3, 4, 5

    ◆ the turndown ratio is 1:1 to 10:1, as the adjustment range of ± 0.1%

    ◆ the turndown ratio is 10:1 to 40:1, ± 0.05 (1+0.1URL/ range)% range

    ◆ range is 6, 7, 8, 9, 0

    ◆ the turndown ratio is 1:1 to 10:1, as the adjustment range of ± 0.15%

    ◆ the turndown ratio is 10:1 to 40:1, ± 0.075 (1+0.1URL/ range)% range

    ◆ stability: the maximum range of ± 0.15%/6 months.

    The effect of temperature: zero temperature error for the maximum range of ± 0.25/55 ℃; total temperature errors include zero and range is the maximum range of ± 0.5/55 ℃

    ◆ note: for the range 3, 9, 0 influence of temperature error double

    The influence of static pressure: (type DP in the linear output) zero error: static 10MPa, error range 4, 5 zeros for maximum range of ± 0.25%, 3, 6, 7 error range, 8 zeros for maximum range of ± 0.5%. This is a system error, before the installation can be adjusted according to the actual pressure transmitter is zero, the elimination of the error. (type HP in the linear output) zero error: static 31.2MPa, zero error is less than the maximum range of ± 2%.This is a system error, before the installation can be adjusted according to the actual pressure transmitter is zero, the elimination of the error.

    The influence of source: less than the output range of 0.005% / V.

    ◆ vibration effects: in any direction, frequency is 200Hz, the error caused by the maximum range of ± 0.05%/G.

    The influence of load: as long as the input voltage is higher than 12V in the transmitter, the work load of the region without load effect.

    The installation position of influence: the maximum can produce no more than 0.25kPa zero error, by correcting this error, no influence on the measurement range; body relative flange rotation.

  Structure index

  1 is connected with the liquid material

    ◆ isolation diaphragm: 316 stainless steel, Hastelloy, Monel and tantalum C;

    ◆ vent / drain valve: 316 stainless steel, Hastelloy C and Munnell;

    ◆ flange and joint: 316 stainless steel, Hastelloy C, Munnell;

    ◆ ORing: fluorine rubber, nitrile rubber, ethylene propylene;

  2 non - material by liquid

    ◆ filling liquid: silicone oil or fluoride;

    ◆ bolt: galvanized steel;

    ◆ electrical shell: low copper aluminum alloy

    ◆ O ring: acrylonitrile butadiene rubber;

    ◆: polyester epoxy resin coating;

3 pressure fittings

    ◆ flange pressure port 1/4-18NPT (taper pipe thread);

    ◆ joint pressure port 1/2-14NPT (taper pipe thread);

    The electrical connection: 1/2-14NPT thread end conduit.

    ◆ weight: 3.5G (not including the option)

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