This is a wireless tank level monitoring system.

On tank side, we use a wireless analog I/O module to collect the level sensor's 4-20mA signal.

Control center, there is an HMI and a pump. We use a LS-RDIO0202 wireless digital I/O module. connect its I/O port with pump for pump ON-OFF control. Connects its RS485 port with HMI. Then you can monitor tank level on HMI and remote control pump ON-OFF.

Projects Description:

• There is a tank. We need to monitor it's tank level
• There is a pump. We need to start pump to take in water when tank is in low level. We should OFF pump when water tank is in high level
• There is a HMI in control center near the pump. We need to remote monitor the tank's level value
• Control distance 1km

LS-RAI02 Parameter:

• Frequency: 433MHz or 450MHz or 470MHz
• Power output: 100mW(600m),1000mW(3000m)
• Products: 2AI
• Input type: 4-20mA
• Resolution ratio: 24 bit
• Accuracy: ±0.02%
• Power supply: 9-36V DC usually use 24V DC
• Interface: RS-485
• Channel No.: 16ch default, can program via DIP switch
• Antenna: Sucker antenna with 1.5m cable
• Working temperature: -35℃~+75℃ industrial
• Working humidity: 10%～90% relative humidity, no condensation
• Dimension: 2AI 115×90×40(mm)
• Fix way: Standard 3.5 inch industrial DIN guild rail

LS-RDIO0202 Parameter:

• Power output: 1W
• Power supply: 9V-30V (usually choose 24V DC or 12V DC)
• Control distance: 3km
• Baud rate: 2400bps
• Receiving sensibility: -123dBm@1200bps, -118dbm(9600bps)
• Networking: Point to point and point to multipoint
• Protocol: Modbus RTU protocol

Port Description:

• Input: 2 active inputs (passive customize), isolated
• Output: 2 passive relay outputs, isolated
• Contact max load: AC250V/5A,DC30V/5A
• Communication port: RS485 (wireless RS485 customize)

Current:

• Transmit current: <600mA (or 100mA version)
• Receiving current: <50mA (or 20mA version)
• General frequency: 433MHz, 400, 450, 470 or other band
• Channel no: 16 channels, can change via DIP switch

Physical Properties:

• Dimension:115×90×40(mm)
• Antenna connector: SMA,vehicle antenna with 1.5m cable
• Temperature: -35℃~+75℃( industrial)
• Mounting method: Standard 3.5 inch industrial guild rail

Why did you make it?

• 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 based, no need internet and monthly fee, full ownership of the system

What makes it special?

You just need 2 device, an analog I/O module and a digital I/O module. Our digital I/O module could connect with your pump as well as your HMI. We can also provide HMI program, well you the whole system. No communication fee. System stable.