F300 most popular capacitive liquid level sensor fuel level sensor high resolution and quality with analog output 

Product Description

1 overview

The DF300 is one kind of high resolution capacitance level sensor, the resolution is 0.1%FS or 1mm (the bigger value). It is made of stainless steel 304 (optional for 316). It is robust for vibration, such as vehicle, generator, railway train and etc.  Also it is good for bad quality liquid, such as sewage or other water.

It is applicable for the close container or open container or pool or river.   As with RS485, it is easy to integrate into the embedded system or SCADA.

In order to realize remote monitoring, there are wireless module optional for DF300, including zigbee, Wifi, GPRS, 3G. Furthermore, GPS module is one optional for the DF300. As a result, DF300 can be used as gps tracker also.

2specifications

 

Length	10-1000mm
Resolution	0.01mm
Pressure	-0.1MPa~0.1MPa
Sensor diameter	16mm
Output	Analog Voltage:0-5V , or Digital: RS 232/485
Voltage	DC 12~40V
Explosion-proof	EXia II C T6
Mounting	Flange
Media	Diesel

 

3 applications

 

4 Mechanical Drawing

5System Diagram

 6Test Report

6.1 Device

F300,  cylinder container, computer

6.2 Data

6.3 Conclusion

Variation for different batch <=3.5%

7 Installation & Cases

7.1 Installation

Before the installation, please check sensor and accessory,such as rubber blanket,screws and tools for drilling hole.

If your tank have a old probe sensor ,you need to remove ,then put the new sensor on your tank . Otherwise,you can directly go to next step.  

Drill big hole on the tank according to the following diagram,  diameter is 30-40mm. Then put the flange on the big hole, and position the small screw, then drill small hole for screw.

Put the glue on the rubber blanket ,then put it under the flange

Put the sensor in the tank at first ,screw to fix it

Connect the power line and signal line according to the definition

Notes: Mounting Position of the sensor should be close to the center of the tank, which can reduce the oil level slope and oil level wave when the vehicles are uphill and downhill.

The sensor is automatically calibrated, so no need to do special calibration.

Put the glue on the rubber blanket ,then put it under the flange

Put the sensor in the tank at first ,screw to fix it

Connect the power line and signal line according to the definition

8 Protocol (for RS232/485/wireless version)

The default baud rate is 9600bps, one start bit, eight data bit, one stop bit, no checksum bit.

8.1 Read Level AD Value

Request: From device to sensor.

ASCII: $!RY0151

Hex: 24  21  52 59 30  31  35  31  0D 0A

$! is header, RY is command, 01 is sensor id, 51 is end.

Reply: From sensor to device

ASCII: *CFV0100FA32B6 

Hex: 2A  43  46  56  30  31  30  30  46 41  33  32  42 36  0D  0A 

* is header, CFV is reply command. 01 is sensor id. 00FA32 is AD value for level. 00 is the padding to fulfill 6 bytes of data section required. FA32 is the level AD value.  Level 0%~100%  equals with 000000~00FFFF.

8.2 Read Level Percent

Request: From device to sensor.

ASCII: $!DO0139 

Hex: 24  21 44  4F  30  31  33  39  0D 0A

$! is header, DO is command, 01 is sensor id, 39 is end.

Reply: From sensor to device

ASCII: *RFV01000.0198 

Hex: 2A  52 46 56  30  31  30  30  30 2E   30 31 39 38  0D  0A

* is header, RFV is reply command. 01 is sensor id.  000.01 is the level value in percent. Max is 100.00.

8.3 Set Sensor ID

Request: From device to sensor.

ASCII: $!ID0133 

Hex: 24  21 49 44  30  31  33  33  0D 0A

$! is header, ID is command, 01 is sensor id, 33 is end.

Reply: From sensor to device

ASCII: *SID01OKOKOK39  or *SID01NONONO42 

Hex: 2A  53  49 44 30  31  4F   4B  4F  4B  4F   4B 33  39  0D  0A 

or 2A  53  49 44 30  31  4E   4F  4E  4F   4E   4F   34  32  0D  0A

* is header, SID is reply command. 01 is sensor id.  OKOKOK means succeed. NONONO means failed.

 8.4 Set damping parameter 

Request: from computer to sensor

ASCII     :   $!Z40134  

Z  is command,01 is ID of sensor,

4 is damping sensor, the range is 1,2,3,4,5,6, .  1 is the smallest parameter, in this condition, the value will update quickest. 6 is the biggest value, in this condition, the fluctuation will be filtered mostly.

In hex   :   24  21  5A  34  30  31  33  34  0D 0A 

Reply: fro sensor  to computer

ASCII     :   *SZN01OKOKOK54   is ok reply

                 *SZN01NONONO5D  is fail reply

In hex     :   2A 53 5A  4E   30  31  4F  4B  4F   4B 4F   4B  35 34 0D 0A 

                 2A  53 5A  4E   30  31  4E   4F   4E   4F   4E  4F   35 44  0D  0A

Notes: The protocol maybe update without notification. Please contact with us for the latest protocol.

9.1 Naming Rules

9.2 Length Clarification

Packaging & Shipping

 

Standard export packing

 

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