Based don Digital Liquid Level Meter of ACD-200L , we increase the remote transmission function which create a model Liquid Level Meter of ACD-201L. By adopting output communication module, RS485 communication, USB communication, (4-20) MA current signal output, ACD-201L can be redirectly read by monitoring PC through communication software to store , process and report output of the measure data. Signal isolated technology , reduce the interference. Built-in lithium battery can work for 5～8 years. ACD-201L Liquid Level Transmitter can acquire the level data consistently when external power off ( communication function failed because of external power off ). Installation of radial, axial and reel packing are available for choice.
Product Patent
Utility model patent certificate
①ZL200820028605.1 《Buttons and LCD display of digital instrument》
②ZL200920062360.9 《Constant current driving circuit with micro power consumption low voltage drop sensor》
Appearance design patent certificate
①ZL200830019531.0 《Instrument （Pressure Testing Gauge）》
Application
- For the level measure of well, pond, water tower, etc；
- For the level measure and monitoring of water conservancy and hydropower；
- Water level measurement of urban water supply and sewage treatment;
- Liquid level measurement and control in industrial field;
- Liquid level measuring for all kinds of open tank, water tank and liquid tank;
Product Characteristics
- Support liquid density modification, can be directly measured in different media；
- Acquisition speed （0.25～10）S/A (S=second, A=acquisition )， settable freely；
- Its development design of battery power supply, is convenient to replace the battery at any time；
- RS485 communication、USB communication、（4~20）mA electrical current output , available；
- Never Off-Line Communication technology, data bus can support 255 units of RS485 sub devices；
- Super Power Management Technology, battery life can be in service for 5~8 years；
- Signal-isolation technology , anti electromagnetic and radio frequency interference technology；
- Buttons pressed with magnetic induction pen, exempt from interference, not easy to damage；
- Broad 5 digits LCD display, very clear for eye-catching；
- Display the liquid level with percentage bar chart, easy to understand；
- Automatic temperature compensation technology, to reduce the error in harsh environment；
- Zero Self-Stability technology, with temperature compensation automatically, stability reliable；
Product Parameters
Measure Range
0~1mH2O~200mH2O ( any scope within it )
Accuracy
0.05%F.S 、 0.1%F.S 、 0.2%F.S 、 0.5%F.S
Output Signal
（4～20）mA（24V DC，two wire）、（1～5）V（24V DC，three wire）
Communication
RS485 、USB
Range Migration
Suggested not exceed 3:1 （ to electrical current output signals）
Over Load Capacity
RL = U-12(V) / 0.02(A)
U— Loop voltage（V）
RL—Allowable Load Resistance （Ω）
Power Supply
Inner ： one pc of built-in 3.6V high volume lithium battery
External：（10~30）V DC
Acquisition Speed
（0.25～10）S/A ( S=second , A=acquisition )，default is 0.5S/A， time is settable .
Stability
Superior to 0.1%FS/Year
Battery Service Life
One Built-in 3.6V high volume lithium battery, reference with environment temperature（16～25）℃
| Acquisition Speed ( A/S) | 4/1 | 2/1 | 1/1 | 1/2 |
| Service Life(year) | 2.8 | 5 | 5.5 | 7 |
| Acquisition Speed ( A/S) | 1/3 | 1/4 | 1/(5-10) | |
| Service Life(year) | 9 | >10 | ||
Environmental Temperature
（-30～70）℃
Relative Humidity
＜90%
Atmospheric Pressure
（86～106）kPa
Others
Correction reference environment temperature: ：20℃±2℃
When 0.05%F.S , the gauge environment temperature ：（0～50）℃
The Medium temperature
Normal （-40～120）℃
Wide Temperature（-60～150）℃
Display
5 digits LCD display + percentage bar chart
Protection Grade
IP65
Explosion proof Grade
ExiaIICT4 Ga
Overload Pressure
(1.5～3）times of the range, depends on the measure range .
Software
AncnView-T analysis software ( with USB communication), can Export instrument data, automatic storage, automatic drawing temperature curve, can be exported to Excel form, read, print,save.
Installation①Radial ②Axial ③ Split & reel packing
Lectotype 
