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4-20mA Wireless Analog Transmitter 1W Modbus RTU 2km Remote Control

I am pleased with them. It was a good choice for our small application. It is a robust device even it has a cheap price. I will use them in our further applications when we should use remote control. Thank you for your support.

—— Codreanu from Romania

Great news! We successfully performed the installation of the two units and transmitted our 4-20mA signal with both antennae. Even the smaller antenna suffices to transmit the signal without any losses whatsoever. So you can understand that we are very happy :) .

—— Kekarios from Greek

I believe you and your products. Sunny is very responsible. The RF modules are really strong and stable. Engineer's suggestions are useful to me. The most important is module's program can updrade on-line by myself. For some special projects, they can customize according my requirements. Thank you for your support all the time.

—— Singh from India

First of all I'd like to thank you for you're prompt service. The system now works perfectly. I left a positive response on your web site. I hope it attracts more customers for you.

—— Peter from Australia

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4-20mA Wireless Analog Transmitter 1W Modbus RTU 2km Remote Control

4-20mA Wireless Analog Transmitter 1W Modbus RTU 2km Remote Control
4-20mA Wireless Analog Transmitter 1W Modbus RTU 2km Remote Control

Large Image :  4-20mA Wireless Analog Transmitter 1W Modbus RTU 2km Remote Control

Product Details:
Place of Origin: China
Brand Name: Lensen
Model Number: LS-RAI04+LS-RAO04
Payment & Shipping Terms:
Minimum Order Quantity: 2pcs
Price: Negotiation
Packaging Details: standard carton
Delivery Time: 2-7days
Payment Terms: T/T, Western Union,
Supply Ability: 6000pcs/month
Detailed Product Description
Power Output: 1W Channels: 4AI
Input Type: 0-5V Or 4-20mA Or 0-10V Distance: 2km
Receiver Side: 4AO Frequency: 433MHz
High Light:

1W Wireless Analog Transmitter


4-20mA Wireless Analog Transmitter


2km Analog Input Module

Wireless Analog Input Module 4-20mA Signal Wireless Transmission Modbus RTU

LS-RAI04 4 channels analog input module
4 channels 4-20mA signal wireless transmission to PLC
0-5V analog signal wireless transmission
0-10V analog signal wireless transfer
2km wireless control in industry automation area
Lensen Wireless RTU features
- Portable device, DIN-rail mounting for easy installation
- Isolated inputs
- LEDs for power supply, communication, input, output status
- Flexible networking, point to point or point to multipoints
- DIP to change different modes
- Different types of I/O, DI, DO, AI, AO are available
- I/O expandable
- Short delay time
- Easy handing on RS485 network, support Modbus RTU protocol
- Support on-line upgrade. Can configure by customer in setting mode

Frequency 433MHz or 450MHz or 470MHz or 868MHz/915MHz or 4G
Power output 1W 
Products 4AI
Input type 4-20mA or 0-5V or 0-10V
Output type 4-20mA or 0-5V or 0-10V
Resolution ratio 24 bit
Accuracy ±0.02%
Power supply 9-36V DC usually use 24V DC
Interface RS-485
Channel No. 15ch default, can program via DIP switch
Antenna Sucker antenna with 1.5m cable
Working temperature -35 °C~+75 °C industrial
Working humidity 10%-90% relative humidity, no condensation
Dimension 115×90×40(mm)
Fix way Standard 3.5 inch industrial DIN guild rail


Advantage of wireless solution
- No wires to bury or maintain, no need to drill holes on wall
- Reliable communication in all direction,any terrain, regardless of hills, walls, trees
- Cost saving in installation and maintenance
- Radio/Lora based, no need internet and monthly fee, full ownership of the system
- 4G based, high speed, no distance limit

Modbus RTU communication and corresponding value
Register types:

Register types Read command

Write command
(Control command)

Power off Function
Hold register 0x01

Input --not support

Not keep Can read input value

A. Hold register
1. Analog input value: 0x0008~0x000B
2. Analog output value: 0x0048~0x004B
B: How to read
Hold register: can read 4 analog input or control 4 analog output at one time
Register control way



Function ID items support
No. IC Type PLC ID Modbus ID
AI1 Hold register 40009 8 Read 03 2AI/4AI
AI2 Hold register 40010 9 Read 03
AI3 Hold register 40011 10 Read 03 4AI
AI4 Hold register 40012 11 Read 03
AO1 Hold register 40073 72 Read/write 03/06 2AO/4AO
AO2 Hold register 40074 73 Read/write 03/06
AO3 Hold register 40075 74 Read/write 03/06 4AO
AO4 Hold register 40076 75 Read/write 03/06

About value calculation
Analog input
Our analog module’s max measure range value is : 0X7FFF
1. Directly measure current and voltage
Exact value=value you read/0x7FFF*max range
For example: to read the 1st passage of module’s (with max range of 0-20mA) input value
Register 0x0008(analog input of the 1st passage)
Feedback: 0x3801
Current value: (0x3801/0x7FFF)*20mA=8.7509mA
2. To measure sensor’s value(4-20mA, 0-6 meter level sensor)
If feedback value is less than 6554, level value is 0
If feedback value is bigger than 6554, level value=(value read-6554)/(32767-6554)*measure ranges
For example: feedback value is 0X3801, then corresponding level value is: ((0X3801-6554)/26213)*6 meter=1.7815 meter
Analog output
Analog module’s max measure range is: 0x7FFF
Directly control output current and voltage
Write register value=current or voltage value/measure range*0x7FFF
For example: to control the 1st passage of analog module whose max measure range is 0-20mA
Register 0x0048 (analog output of the 1st passage)
To write register value:(8.75/20mA)*0X7FFF =14336=0x3800

Contact Details
Shenzhen Qianhai Lensen Technology Co., Ltd

Contact Person: Sunny

Tel: +8613826574847

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