First, use:
ZRN301 series Differential pressure sensor By a stainless steel diaphragm and the fixed electrode form a variable capacitor, pressure changes, the capacitance value changes. Setra unique detection circuit will change the capacitance value of the DC signal is converted to a linear elastic membrane can withstand 70KPa overvoltage (forward / negative without damage to be), this transmitter has been carried out over a wide temperature compensation, resulting in improved temperature performance and long-term stability.
ZRN301 Differential Pressure Transmitter In explosion-proof environment can be used to measure differential pressure or gauge (static), and converts the signal into a proportional current signal, the output current signal 4-20ma. Intrinsically safe, explosion-proof grade iaIICT4 (selected) normal work, the minimum measuring range up to 0 ~ 100Pa, maximum measurement range 0 ~ 1000Kpa, at room temperature accuracy of ± 0.25% FS, temperature compensation in the range of + 5 ~ + 65 ℃, by temperature compensation circuit, the temperature is less than ± 0.06% FS / ℃.
ZRN301 its excellent performance and low cost is widely used in natural gas pipeline monitoring, power plant air pressure testing, research and other areas, such as HVAC, laboratory, energy management systems, fan control, pollution control, clean engineering, gas pipeline system , underground ventilation monitoring, medical instruments and equipment.

Second, the main technical characteristics:
This product strictly enforce the US military standard MILL-45208A and MILL-STD-45562A, high cost
Minimum measuring range up to 0 ~ 25Pa, the maximum measurement range of 0 ~ 25Kpa, has six kinds of field selectable ranges
SETRA variable capacitance sensing technology, stainless steel diaphragm, using stainless steel sub-arc welding of sensitive technology, measurement stability
You can measure differential pressure, extensive pressure, application
Wider temperature compensation range: + 5 ~ + 65 ℃
Strong overload capacity: up 70KPA
UL94V-0 flammability rating, and bad wiring protection
Compliance with intrinsically safe certification: iaIICT4 (c268 selected)

Third, the main technical parameters
Measuring range: Minimum 0-100PA, maximum 0-100KPA supply: 9-30VDC
Output signal: Two 4-20MA Storage temperature: -54-82 ℃
Medium: air or similar non-conductive gas Weight: 255347.5g
Accuracy: Standard ± 1% FS, selected ± 0.4% FS, ± 0.25% FS Protection class: IP65 / NEMA-4
Nonlinear ± 0.98% FS, ± 0.33% FS, ± 0.20% FS cast aluminum housing
Hysteresis ± 0.20% FS, ± 0.20% FS, ± 0.20% FS Preheat drift ± 0.1% FS
Non-repeatability ± 0.1% FS, ± 0.1% FS, ± 0.1% FS installation ¢ 3mm screws hanging hole
70KPA to both positive and negative overload flammability rating UL94-0
Operating temperature -18-65 ℃ (temperature only electronic components, the temperature measurement medium may be higher or lower)
Output zero and span adjustments can be carried within the housing; with six kinds of field selectable ranges.
Pressure connection with 1/4 "hose connected to 3/16" pyramid compression fitting (¢ 8 tower pressure connector)