Resistance Liquid Level Sensor

The entire sensor machine doesn't contain any elasticity or moving parts.Impact resistance, maintenance-free, long service life, easy installation,can be installed in various occasions.Accurate measure for gasoline, diesel oil, hydraulic oil level and other various weak corrosive liquid level .

This liquid level sensor is level measuring instrument,contain high resolution ratio and measurement accuracy.It is automatic calibration which does not need manual intervention,no temperature drift, and is not affected by medium change.In other words,regardless of the measured medium is water or gas or diesel, no matter how temperature changes, it can output signal accurate liquid level height at one sensor. Completely solve the problem of measure medium difficulty ,like ethanol and methanol,and the problem of measurement error caused by oil’s label and great temperature difference in different areas.

The equipment can be used cooperatively with GPS vehicle positioning terminal and other terminal to make vehicle positioning and fuel consumption management system.It can evaluate the usage of the vehicle and the driver's driving level,monitor gas up situation of vehicle,precise calculate hundred kilometers fuel consumption,completely eradicate the phenomenon of oil stolen,oil spilling,detouring,make extra money,private use of government vehicles,falsely making receive.

1. performance index

Examination area: 100~1000mm

resolution ratio: 0.1%

Measuring accuracy:0.1%

Maximal error of measure :1mm

heat-resistant :-40~150

Diameter Φ18mm

Output signal :4~20mA,0~5V, RS485, RS232, CAN bus

Voltage supply :DC7~42V

Rated supply :0.1W

Fixed type :Screw installation M20X1.5 OR Flange mounting

Pressure range :-0.1MPa ~ 0.1 MPa

ambient temperature -40~85℃

2.Instructions

2.1 definition of the output line

Interface output line use 6 core cable, connecting definition:

4~20 mA output [CA-201B]:

Black line connect ground wire

Red line connect positive power

White line 4~20mA ampere signal out put,connect ampere signal line

Yellow line empty fuel tank use only

Green line full fuel tank use only

2.3 Installation Notes

To finish the installation ,insert the sensor and use a wrench to tight.

connect the power cord, communication line, cable, ground wire according to the definition, and yellow line and green line need to trape one by one , preventing from the short circuit

Link the power of the sensor after checking the circuit

Installation position should be placed as near as possible to the center of the fuel tank, in order to reduce the influence of the oil level of tilt and the oil level of volatility while on the hill.

3.Notice

4. The power supply voltage of sensor cannot be more than the normal working voltage, and the power consumption of the sensor’s power supply cannot be less than the normal working power consumption.

5. The actual environment should conform to the requirements of the basic parameters of sensors, and shall not exceed the normal range, or it would damage the sensor, even cause other accidents.

6. On account of oil products, there are differences between the mediums of the calibration and use, users had better operate according to 2.2.2.

7. Do not remove sensors or damage it maliciously, or we do not guarantee it.

Symptom of failure

1No-output /communication error

2The output value unchanged

3Measurement error of output value

4Output value floats up or down

cause analysis

3 service voltage abnormal

external interference

Sensor jammed

autoadaptation uncomplete

Sensor fault

Exclusion and solutions

3 detect whether service voltage is stable while loading ( if the voltage is unstable) → →whether external have interference→check whether the sensor is jammed → execute the 2.2.2 process →then it should be the sensor fault

remark

1 4~20mA output supply voltage DC20~28V,current is 4~20mA except communication output

2Check the tank oil level is float or not,if become regular after recharge,check the interference and the power

3 it usually can be functional while executing the 2.2.2 process