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C268 Micro Differential Pressure Sensor
C268 Micro Differential Pressure Sensor
Product details
C268MR（EX）Intrinsic safety explosion-proof differential pressure transmitter
The C268 series differential pressure sensor consists of a stainless steel diaphragm and a fixed electrode forming a variable capacitor. When the pressure changes, the capacitance value changes. Setra's unique detection circuit converts changes in capacitance values into linear DC electrical signals. The elastic membrane can withstand an overpressure of 70kPa (positive/negative) without damage. This sensor/transmitter has been temperature compensated to improve temperature performance and long-term stability.
The C268 or C268MR micro differential pressure transmitter can be used to measure differential pressure or gauge pressure (static), and convert the signal into a proportional current signal, outputting a current signal of 4-20mA. The excitation voltage is 24VDC. C268 (EX) meets intrinsic safety requirements, with an explosion-proof rating of ia ll CT4 (optional), and can operate normally in an explosion-proof environment. C268/Model 268MR * has a small measurement range of 0-25kpa and an accuracy of ± 1% FS at room temperature. The temperature compensation range is+5~+65 ℃, and the temperature effect is reduced to less than ± 0.06% FS/℃ through a temperature compensation circuit.
C268/268MR is widely used in natural gas pipeline monitoring, power plant wind pressure detection and other fields due to its * * performance price.
application
environmental pollution control
Clean Engineering
Oven pressurization and furnace ventilation control
Supervisor of natural gas and gas pipeline network
Medical instruments and equipment
advantage
Featuring 6 on-site selectable ranges
SETRA Variable Capacitive Sensing Technology
Stainless steel sub arc welding sensitive components
Compliant with intrinsically safe explosion-proof certification ia ll CT4 (268EX special selection)
UL94V-0 flame retardant rating
The standard accuracy is ± 1% FS
Accuracy can reach ± 0.4% FS
± 0.25% FS (selected)
*The small measurement range is 0-25pa
C268/ 268MRPerformance specifications
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performance parameter
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standard
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handpicked
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handpicked
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Accuracy RSS * (at constant temperature)
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±1.0%FS
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±0.4%FS
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±0.25%FS
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Nonlinear (* best fit straight line)
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±0.98%FS
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±0.33%FS
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±0.20%FS
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delay
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±02%FS
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±0.2%FS
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±0.2%FS
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non-repetitive
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±0.1%FS
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±0.1%FS
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±0.1%FS
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Temperature influence*
Compensation range
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+5～+65℃
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Zero/full range offset
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<0.06% FS/℃
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*Large linear pressure
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70kpa
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overload
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Both positive and negative directions are 70kpa (10psi)
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Preheating drift
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±1.0%FS
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Installation location impact***
When the product is calibrated at the factory
Place the membrane vertically)
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range
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Zero offset (% FS/G)
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0～25Pa
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2.1
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0～250Pa
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0.22
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0～1250Pa
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0.14
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0～7500Pa
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0.06
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*RSS is the square root of nonlinearity, hysteresis, and non repeatability
Environmental and mechanical parameters
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operation temperature
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-18～+65°C
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Storage temperature
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-54～+82°C
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Electrical connection
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PG-9 cable locking device
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Pressure connection
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3/16 "tower shaped pressure joint connected to 1/4" hose, with a diameter of 8 tower shaped pressure interface
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Output adjustment
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Zero and full-scale adjustments can be made inside the casing
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pressure medium
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Air or similar non-conductive gases
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housing
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Cast aluminum material
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weight
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347.5g
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install
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Φ 3mm screw hanging hole
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Electrical data (current type)
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circuit
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2-wire with misconnection protection function
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Zero point output
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20mA±0.16 mA
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external load
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0-800 Ω (factory calibration uses 250 Ω)
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*Small power supply voltage
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9+0.02 x (receiver additional wire resistance) VDC
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*Large power supply voltage
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30+0.004 x (receiver additional wire resistance) VDC
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Ordering Guide
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