the cheapest over the ear headphones
Model: AR-T019
1.Frequency Range: 20Hz - 20KHz
2.Impedance: 32 Ohm
3.Speaker:30MM
4.Sensitivity:96dB
5.Plug Type :3.5mm Stereo
6.Length of Cable: About 1.2m
7.Microphone Sensiticity: -42dB±3dB
8.Microphone Specification:6*1.5mm
9.ABS Frame
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Model |
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Item |
ARC2232aK |
AR2232aT |
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Scope of Application |
Combustible gas such as alkanes and combustible vapor like volatile organic matters such as alcohol and gasoline |
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Detection Principle |
Catalytic combustion |
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Sampling Mode |
Diffusion |
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Measurement Range |
0~100%LEL |
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Alarm Error |
± 3%LEL |
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Response Time |
≤ 30S |
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Working Voltage |
DC24± 6 V |
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Power Consumption |
1.5W(DC24V) |
1W(DC24V) |
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Operating Environment |
Temperature: -40C~+70C; Relative humidity: ≤ 93%RH; Pressure: 86~106kPa |
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Connecting Thread of Outgoing Line Hole |
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G3/4 pipe thread (internal) |
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Signal Output |
Alarm: Passive normally-on contact output of electric relay |
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Trouble: Passive normally-off contact output of electric relay (contact capacity: DC24V/ 1A) |
4-20mA standard signal |
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Ex-factory alarm set value: |
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25%LEL (default) |
Maximum load resistance: < < 250(≥ 16VDC), 500(≥ 20VDC) |
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Explosion-proof Grade |
Exd IICT6 |
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Protection Grade |
Up to IP66IP66 |
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Transmission Distance: |
≤ 1000m (RVV3× 1.0mm2 ) |
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Sensor Service Life |
Three years (average) |
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Sensor Storage Temperature |
-25? ~+55? |
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