Chip:
Imported ceramic piezoresistive core body;
The selected mounting process has zero point, full range compensation and temperature compensation;
Principle of hydrostatic level / water level measurement;

Signal processing and output:
24 bit ADC sampling and processing chip;
DSP digital signal conditioning algorithm;
Multipoint linear temperature calibration;
Voltage and current overload protection;
Standard industrial signal output: 4-20mA (two-wire system), 0-20mA (three wire system), 0-5vdc, 0-10vdc, 0.5-4.5vdc (three wire system);

Digital communication signal output: rs485-rtu, ultra-low power rs485-rtu
Advanced 32 bit microprocessor and 24 bit ADC are adopted
The transmission protocol is MODBUS-RTU
Support baud rate: 1200 ~ 57600bps, check bits: none, odd, even
Support the user's secondary calibration, reset, anti reset, restore factory operations
Support 11 kinds of units switching, support floating point, integer, percentage, formatted output
The acquisition interval of 0 ~ 43200 seconds (12 hours) can be set, which can not only meet the needs of high-speed acquisition, but also trigger acquisition once to 

minimize power consumption

Digital communication signal output: CAN2.0B
Measurement rate: 10... 1000Hz can be set, the default is 50 Hz

CANopen output built-in complete CANopen protocol stack, in line with ds301, ds404 specifications, support LSS services, support bootloader online upgrade;
Support baud rate (kbps) 20 / 50 / 100 / 125 / 250 (default) / 500 / 800 / 1000; support features of NMT / heartbeat / SDO / PDO / LSS / bootloader; CANopen protocol 
stack can be customized according to user requirements;

J1939 output has built-in J1939 protocol stack. PGN, SPN and name can be configured freely, and bootloader online upgrade is supported;
Support baud rate (kbps) 20 / 50 / 100 / 125 / 250 (default) / 500 / 800 / 1000; 
support free configuration of features such as PGN, SPN and name
The J1939 protocol stack can be customized according to the user's requirements;

Structure:
The shell material is made of corrosion-resistant imported polytetrafluoroethylene (Teflon);
IP68 sealed waterproof electrical outlet;
Special Teflon liquid level cable

Application:
Water level measurement and monitoring of seawater and brine;
Liquid level measurement and monitoring of pH value 3-11;
Liquid level measurement and monitoring of chemical and other corrosive liquids;

Technical parameters
Measuring medium: corrosive liquid
Pressure form: gauge pressure (static pressure)
Range: 0 ～ 5mh2o ～ 100mh2o;
       The minimum range is 5 m water level height, and the maximum range is 100 m water level height
Comprehensive accuracy: ± 0.25% FS; ± 0.5% FS; ± 1% FS
Nonlinearity: ≤ 0.25% FS
Repeatability: ≤ 0.1% FS
Output signal: current type: 
    4-20mA two-wire system; 4-20mA / 0-20mA three-wire system
    Voltage type: 0 ~ 5VDC, 0 ~ 10VDC, 0.5 ~ 4.5vdc three wire system
    Digital type: rs485-rtu, low power rs485-rtu
    Temperature and pressure integration: 4 ~ 20mA two-wire system + Pt100
    Digital temperature and voltage: rs485-rtu / low power rs485-rtu + Pt100
    CAN2.0B (supports CANopen, J1939 Protocol)
Power supply voltage: 
    24 VDC (9 ~ 30 VDC) universal type
    3.1 ~ 6.1vdc (low power rs485-rtu)
    5VDC (0.5 ～ 4.5vdc output type)
Insulation impedance: ≥ 1000 m Ω / 100VDC
Load impedance: current output: ≤ 800 Ω; voltage output: ≥ 50K Ω
Digital output address: 1 ~ 128
RS485 baud rate: 9600 (factory default) 1200 ~ 115200 (BPS)
CAN2.0B has built-in CANopen protocol stack or built-in J1939 protocol stack
Can baud rate: 20 / 50 / 100 / 125 / 250 (default) / 500 / 800 / 1000 (kbps)
Medium / ambient temperature: - 20 ～ 80 ℃
Compensation temperature: 0 ～ 70 ℃
Overload pressure: 150% FS
Stability: ≤± 0.15% FS / year
Vibration effect: ≤± 0.15% FS / year (mechanical vibration frequency 20Hz ~ 1000Hz)
Failure pressure: 3 times of measuring range (less than 350Mpa); 2 times of measuring range (measuring range greater than 400MPa)
Electrical connection: Waterproof tight wire nut directly leads out, can be matched with explosion-proof electrical connection
Protection grade: IP68
Connecting cable: special Teflon liquid level cable
Connecting material: imported polytetrafluoroethylene (Teflon)