AO920W ceramic capacitor type input level transmitter
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- Technical specifications
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- AO920W ceramic capacitor type input level transmitter
measuring principle
The product uses ceramic substrates and diaphragms coated with metal as electrodes,maintaining a controllable gap between the two ceramic components to form a capacitor.By applying pressure,the gap between the substrate and diaphragm changes,altering the capacitance.This change is then processed by a circuit to generate a pressure-
related signal output.This dry pressure measurement technology,which does not use an intermediary liquid,fully leverages the technical advantages of ceramic sensors,such as their ability to withstand overloads and shocks, excellent stability,and high measurement accuracy.
main features
▶ The sensor is a "E+H"dry ceramic sensor with compensation;
▶ Excellent overvoltage performance,can reach 200 times of the range;
Without intermediary liquid,the sensor can obtain good measurement accuracy and is less affected by temperature;
Waterproof,dustproof,shockproof,explosion-proof,corrosion- resistant;
Liquid contact material:membrane(alumina ceramic),connection: 316L,seal:fluororubber;
▶ Explosion-proof:intrinsically safe (need to be used with input type safety barrier),explosion-proof;high precision,good stability;
The seismic performance is good and there are no mechanical moving parts;
It has PV reset function;
The menu is rich and can set various parameters;
▶ Supports HART communication protocol;
▶ Stable backlight display,make reading the meter easier;
▶Shell material:aluminum(conventional),stainless steel;
application scenarios
It is suitable for use in the industrial field of liquid level measurement.According to the temperature,pressure,
corrosiveness,explosion-proof requirements,safety requirements,measurement range and other working conditions of the medium,each type of products are selected.
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technical parameter
accuracy ±0.1%、±0.2%、±0.5% level 0~20m intervals,others medium liquid temperature -40.0~85℃ protect Better than IP65 stability Better than ±0.1%FS/1 year Vibration effects At 20~200Hz in any direction,the variation is less than±0.02%BFSL shock effect When the 100G impact is 11ms in any direction,the change is less than±
0.02%BFSLLoad impact As long as the terminal voltage of the transmitter is greater than 12VDC Production
optionsNo oil,no water,no oil,no fat explosion-proof ExiallCT6 Intrinsically safe,ExdIICT6 Flameproof Power Supply
Voltage12~36VDC,two-wire system signal Two-wire 4~20mA,HART -
AO920W ceramic capacitor type input level transmitter Instrument Model AO920W ceramic capacitor type input level transmitter Measurement Range F2 Split-Type Anti-Corrosion Cable-Mounted (Note 1) D Flange Direct-Mount Type (Note 2) Measurement Range (Note: Specify the factory-set range when ordering; if not specified, it will be delivered with the maximum rated range) A 0～1mH2O B 0～2mH2O C 0～5mH2O D 0～10mH2O E 0～20mH2O F 0～50mH2O G 0～100mH2O H 0～200mH2O Output Signal 8 RS485-ModBus RTU Communication E 4～20mADC S Intelligent HART Fieldbus Protocol Interface Basic Error 2 0.10% 3 0.20% 4 0.50%(note3) 9 other Options M3 3 1/2-Digit LCD Digital Display Head B3 Pipe-Mounted Flat Bracket B4 L-Shaped Mounting Bracket (316 Material) E Mounting Flange Available (Note: Size) i Intrinsically Safe Type Exia IIC T6 d Explosion-Proof Type Exd IIC T6 L Lightning Protection Cable Length LM Unit: Meter (m) Selection Example AO920W - F2 - C - S - 3 -M3d - 005 Note1 The process connection thread of the split-type level transmitter is M66*2, which is compatible with flanges above DN65. Note2 The process connection method of the flange direct-mount level transmitter is DN50-1.0 flange (default). For special orders, please specify Note3 Models with 0.1% and 0.2% accuracy come standard with an LCD digital display head.； Note4 This product must NOT be used with media containing acetic acid, ammonia, etc.； Note5 When equipped with RS485-ModBus RTU communication output, the accuracy is 0.5% by default.
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