Non-contact liquid level sensor instruction manual
(Intelligent external paste type detection liquid position series products)
PRO RANGE-Y28-RS485

Overview

The intelligent non-contact liquid level sensor (hereinafter referred to as the liquid level sensor) adopts advanced signal processing technology and high-speed signal processing chip, which breaks through the influence of the container wall thickness and realizes the true non-contact of the liquid level in the closed container. Contact detection. The liquid level sensor (probe) is installed on the upper and lower sides of the outer wall of the container to be tested (the high and low levels of the liquid level). The non-metallic container does not need to be opened, and the installation is simple and does not affect production. It can detect the level of various toxic substances, strong acids, strong alkalis and various liquids in high-pressure airtight containers. The liquid level sensor has no special requirements for the material of the liquid medium and container, and can be widely used.
PRO RANGE-Y28-NO/NC/ RS485 products are specially developed for non-metallic pipes (pipe outer diameter D≥11MM) or flat container liquid level detection. They are relay normally open output and relay normally closed output and RS485 interface output.

Product Features

1. PRO RANGE-Y28-NO/NC/ RS485 sensor, suitable for non-metallic pipes (pipe outer diameter D≥11MM) or flat containers without direct contact with liquids,
   It will not be corroded by strong acids or alkalis and other corrosive liquids, and will not be affected by scale or other debris. It can be completed to detect whether there is liquid inside the container or pipeline.
2. Intelligent liquid level reference adjustment and liquid level memory function, liquid level status display mode, can realize multi-point series connection.
3. The detection is accurate and stable, and the boiling water level can be detected.
4. Pure electronic circuit structure, non-mechanical working mode, stable performance and durability.
5. High stability, high sensitivity, strong anti-interference ability, free from external electromagnetic interference, special treatment for power frequency interference and common mode interference, to be compatible with all 5V, 12V, 24V power adapters on the market.
6. Strong compatibility, penetrating various non-metallic container pipes, such as plastic, glass, ceramics and other containers, the induction pipe wall thickness can reach 20mm; suitable for all kinds of curved, arc, cylindrical containers or pipes Liquid level detection.
7. The voltage can be selected (5V, 12V, 24V), suitable for connecting various circuits and product applications.

Product Applications

1. The intelligent non-contact liquid level sensor uses the inductive capacitance of water to detect whether there is liquid. When there is no liquid close to the sensor, the sensor has a certain static capacitance to the ground due to the distributed capacitance on the sensor. When the liquid level slowly rises and approaches the sensor, the parasitic capacitance of the liquid will be coupled to this static capacitance, making the capacitance value of the sensor larger, and the changed capacitance signal is then input to the control IC for signal conversion. The capacitance is converted into a change of a certain electrical signal, and then a certain algorithm is used to detect and judge the degree of this change. When the change exceeds a certain threshold, it is considered that the liquid level has reached the sensing point. 。

Product parameter

Project name	Para meters
Product      model	PRO RANGE-Y28-RS485
Supply voltage (Vin)	24V (12V can be customized)
Output mode	Communication output
electric current	13mA
The output current	DC24V/2A
Response time	500mS
Working temperature	-20-105°C
Sensor sensitivity	Outer diameter of pipe D(mm)	Sense container wall or tube wall thickness L(mm)
	D>100	20 ± 3
	100>D>80	15 ± 2
	80>D>60	12 ± 1.5
	60>D>40	7 ± 1.0
	40>Da.30	5 ± 1.0
	30>Da20	3 ± 1.0
	20>D>10	1.5 ± 0.5
Applicable pipe diameter range	>11mm
Liquid level accuracy	±1.5mm
humidity	5%-100%
Line length	500MM (±10MM) (Bulk can be customized)
Terminal sequence	Brown (power supply positive), yellow (signal output) Blue (power negative), black (COM terminal)
Material	PC-VO fireproof material
Waterproof performance	IP67
Safety standard certification	CE
Environmental protection certification	ROHS2.0

Product selection

RS485 communication output interface—————Model: PRO RANGE-Y28-RS485 (DC 24V)
RS485 communication output interface—————Model: PRO RANGE-Y28-RS485 (DC 5V-12V optional)

Clearance requirements

Requirements for the clearance between the contact surface of the sensor (or probe) and the outer wall of the container the contact surface of the sensor (or probe) and the outer wall of the container should be tightly pasted with AB or other solid-resistant glue. If there are special requirements, the gap should be less than 0.5mm, preferably no gap, otherwise it may affect the measurement accuracy.

Installation method

Install into a flat cistern as shown in the figure below

Install to the non-metal water pipe type as shown below
The height of the sensed liquid level is related to the sensitivity of the sensor. The higher the sensitivity, the lower the sensed liquid level
Note: The liquid level is sensed in the upper and lower edges of the sensor, which is normal.
The induction sheet can be tightly attached to the pipe with strong glue, or it can be tightened with the pipe with a nylon cable tie. The part where the probe is installed cannot be made of metal parts, so as not to affect the detection. Pipes made of non-metallic materials with flat surface, uniform thickness, tight material, and good insulation performance; such as glass pipes, plastic pipes, PC/PVC pipes, non-absorbent ceramic pipes, acrylic pipes, rubber pipes, etc. or other composite materials into the pipeline.

Sensitivity adjustment:

If the non-contact liquid level sensor cannot detect or the detected liquid level deviates from the Y28 sensor, The sensitivity knob can be adjusted with a small screwdriver. Setting method:

1. Turn counterclockwise to increase sensitivity.
2. Turn clockwise to lower the sensitivity.

RS485 communication type sensor wiring sequence

The input voltage is DC24V (12V can be customized). (Model: PRO RANGE-Y28-485)

Modbus-RTU protocol format:
1.1 The hardware adopts RS-485, master-slave half-duplex communication, the master calls the slave address, and the slave answers the communication. The data transmission adopts the standard Modbus-RTU protocol format.
1.2. The default configuration of the serial port:
Baud rate: 9600
Data bits: 8
Check Digit: None
Stop bit: 1
1.3 Function code 03H: read sensor signal value Host sends: (hexadecimal) 01 03 00 01 00 02 95 CB

1	2	3	4	5	6	7	8
Sensor address ADR	Function code	Register start address high byte	Register start address low byte	Number of read registers High byte	Number of read registers Low byte	CRC low byte	CRC high byte
01	03	00	01	00	02	95	CB

1.4 Byte number/comment

Byte number	Byte/comment
1st byte ADR	Slave address code (001～254)
The Second byte 03H	Read register value function code
3rd and 4th bytes	Read the start address of the register
5th and 6th bytes	Number of read registers (1~5)
7th and 8th bytes	CRC16 checksum from byte 1 to 6. 7 bytes: CRC low byte; 8 bytes: CRC high byte.

1.5 Sensor return: (hexadecimal)

Serial number	1	2	3	4	5	6	7	8	9
Byte/com ment	Sensor address ADR	Function code	Returns  the    total number of bytes	High level of liquid level status value	Low level status value	Signal strength RSSI value high	Signal strength RSSI value low	CRC low byte	CRC high byte
Liquid level detected	01	03	04	00	01	10	04	A7	F0
Not detected Liquidlevel	01	03	04	00	00	00	00	FA	33

1.6 Set sensor address ADR

1	2	3	4	5	6	7	8
Current address ADR	Function code	Register start address high byte	Register start address low byte	Keep	New address value ADR	CRC low byte	CRC high byte
01	06	00	04	00	02	49	CA

1.7 Sensor return (setting is successful, LED flashes.)

Serial number	1	2	3	4	5	6	7
Byte/comment	Sensor address ADR	Function code	Register start address high byte	New address value high ADRH	New address value low ADRL ADRL	CRC low byte	CRC high byte
Set successfully	02	06	02	00	02	7D	49
failure	01	06	02	00	01	79	48

1.8 Set the baud rate (setting is successful, the LED flashes, no return.)

1	2	3	4	5	6	7	8
Current address ADR	Function code	Register start address high byte	Register start address low byte	Keep	Baud rate serial number	CRC low byte	CRC high byte
01	06	00	05	00	07	D8	09

1.9 Baud rate sequence comparison table

Serial number	Baud rate value
01	110(Reserved, unused)
02	300(Reserved, unused)
03	600(Reserved, unused)
04	1200(Reserved, unused)
05	2400
06	4800
07	9600
08	14400
09	19200
0A	28800
0B	38400(Reserved, unused)
0C	57600
0D	115200
0E	128000
0F	256000

2.0 Restore factory settings (The setting is successful, the LED flashes twice. No return.)

1	2	3	4	5	6	7	8
Current address ADR	Function code	Register start address high byte	Register start address low byte	Keep	Baud rate serial number	CRC low byte	CRC high byte
FF	06	00	04	00	02	5C	14

2.1 Register description

Serial number	Register address	Initial value	description
1	0000	00 00	Reserved, unused
2	0001	00 00	Induction output status register OutPut OutPut = 0000: No liquid is sensed OutPut = 0001: Liquid is sensed
3	0002	00 00	Sensor signal strength register RSSI When RSSI<3900, OutPut = 0000. When RSSI>4100, OutPut = 0001. When 4100>RSSI>3900, OutPut keeps.
4	0003	00 01	Sensor module communication address Addr (001～254)
5	0004	00 07	Baud rate register (reference: baud rate sequence comparison table)

Product size and physical map

Other matters needing attention

1. The viscosity of the measured liquid medium
   When the dynamic viscosity is less than 10mPaS, it is measured normally. 10mPaS<dynamic viscosity<30mPaS may affect the detection. When the dynamic viscosity is greater than 30mPaS, it cannot be measured because a large amount of liquid adheres to the container wall.
2. Note: As the temperature increases, the viscosity decreases, and most high-viscosity liquids are more affected by temperature. Therefore, pay attention to the influence of liquid temperature when measuring viscous liquids.
3. Pay attention to keeping the sensor clean, try to prevent corrosion and avoid violent collisions and blows from other objects.
4. During outdoor installation, avoid direct sunlight and rainwater directly flowing to the main body of the sensor, and keep away from high heat sources and pay attention to ventilation. If the ambient temperature exceeds the rated temperature, corresponding cooling protection measures should be taken.
5. When the ambient temperature is lower than the normal operating temperature range of the sensor, an instrument protection box or other protective rain cap devices can be used for antifreeze protection, and pay attention to keeping the sensor dry. The sensor should be regularly maintained and inspected. (The detection time interval is determined by the use unit according to the specific situation).

Troubleshooting:

Fault status	Analyze the reasons	Problem solving measures
After the liquid level sensor is energized, there is no response (the indicator light does not light when the water level reaches the sensing point, and the sensitivity adjustment has no response)	①The power cord is not connected	Check and connect the power
	② The positive and negative ends of the power cord are reversed	Correct wiring
	③The power module is damaged	Replace the circuit board where the power module is located
	④Sensitivity is too low	Adjust the sensitivity to the appropriate gear
The indicator light keeps on	①Sensitivity grade is too high	Adjust the sensitivity to the appropriate grade
	②The initialization parameters are abnormally modified	Return to the factory to reinitialize
	③The sensor has debris or other metal parts close to it	Clean up debris and keep a certain distance from metal parts

Product warranty terms and instructions

(A). Warranty service

1. Warranty period maintenance: from the date of purchase, the product host has a one-year free warranty. The company has the right to decide to repair or replace the faulty part. If it is replaced, the replacement part may be a new device or a repair product of the same category, function, and quality. The replaced faulty part belongs to the company; the product Resale and repair do not affect the warranty period. Products that have been repaired or replaced continue to enjoy the original remaining warranty period service. If the warranty period is less than three months after the repair, the repaired or replaced part shall be shipped from the date of delivery Warranty for three months; all products of the company are guaranteed for repair.
2. Loss upon arrival (DOA) replacement: From the day of purchase, you can enjoy a free replacement service within 7 days. Products with the following problems are defined as DOA equipment: the packing and packing list do not match after the first unpacking of the product; some or all of the components cannot be used normally after the first unpacking of the product (surface scratches or other things that do not affect the function of the device) Defects are not included); other hardware failures identified by our company’s engineers remotely or locally.

(B). Applicable limitations of warranty
For the following situations, the company does not assume warranty responsibility:

1. The product is out of warranty; the surface of the product is fragile and damaged; the appearance of the product is seriously damaged, installation/use in abnormal environment, unauthorized disassembly and repair/modification, external power supply damage and other abnormal damage;
2. Damage caused by incorrect installation and use of the product by the user not following the requirements of the manual;
3. Damage caused by natural disasters and human negligence (fire, lightning, flooding, impact, etc.).

(C) . Accessories and consumables are not covered by the warranty.
(D) . Non-free warranty service
Within two years of product purchase, for non-warranty product (including components) failures and damages, you can choose paid maintenance services (free labor costs), and we will charge the transportation cost of repairing parts and
accessories according to the actual situation.
(E). Ways to obtain warranty service
It is recommended that you contact the dealer who purchased this product to obtain the warranty service. For the warranty, please present a valid warranty card (the dealer’s stamp is required to take effect) or the purchase invoice/receipt: if you can’t show it, the product’s free warranty period 12 months from the product shipment date, and the latest DOA application deadline is 7 days from the product shipment date.
(F). Statement

1. The copyright of this manual belongs to Shenzhen Pro Range Technology Co., Ltd. (Pro Range) and its authorized licensors. Shenzhen Pro Range Technology Co., Ltd. (Pro Range) reserves all rights.
2. Without the written permission of the company, no unit or individual may excerpt or copy part or all of the contents of this manual, and shall not spread it in any form.
3. The customer recognizes that the purpose of the design and production of the company’s products does not involve use in products related to life support or other systems or products used in other dangerous activities or environments. Personal injury or death, property or environmental damage due to product failure (collectively referred to as high-risk activities). The company’s products are artificially used in high-risk activities, and the company does not guarantee it and is not liable to customers or third parties.
4. Due to product version upgrades or other reasons, the contents of this manual may change. Pro Range reserves the right to modify the contents of this manual without any notice or prompt. This manual is only used as a guide. Pro Range makes every effort to provide accurate information in this manual. However, Pro Range does not guarantee that the contents of the manual are completely free of errors. All statements, information and suggestions in this manual do not constitute any express or Implied guarantee.
5. Not all models are available in all countries/regions
   Please keep this manual properly. Before using the product, please read this manual carefully. When using the product, please be sure to operate in accordance with this manual. The company is not responsible for injuries and accidents caused by operations that do not follow this manual.
   (G). Environmental protection This product meets the design requirements for environmental protection. The storage, use and disposal should comply with relevant national laws and regulations. Seek to proceed.

Manual version

Version	Release date
V17	May 22, 2023

Documents / Resources

Pro Range Y28-NO Non Contact Liquid Level Sensor [pdf] Instruction Manual Y28-NO Non Contact Liquid Level Sensor, Y28-NO, Non Contact Liquid Level Sensor, Contact Liquid Level Sensor, Liquid Level Sensor, Level Sensor

References

• User Manual