MODBUS SLS20 Input Type Liquid Level Transmitter -1-5m Range/Corrosion and High Temperature Resistance/Water Tower Liquid Level HA Monitoring

Product Overview

MODBUS SLS20It is an input type static pressure liquid level transmitter that directly inserts the sensor probe into the bottom of the liquid and accurately calculates the liquid level height by measuring the static pressure of the liquid. The range can be selected from 1-5 meters, with anti-corrosion and high-temperature resistant design, suitable for liquid level monitoring in water towers, water tanks, water pools, sewage wells and other scenarios. Upload liquid level data to Home Assistant or industrial control system through RS485 Modbus RTU protocol.

Measuring principle

The input type liquid level gauge is based on the principle of "liquid static pressure=liquid density x gravitational acceleration x liquid level height". The probe is equipped with a high-precision pressure sensor, which converts the hydrostatic pressure into 4-20mA or RS485 digital signals to linearly calculate the liquid level height.

Core Parameters

• Range: 1 meter/2 meters/3 meters/5 meters optional
• Accuracy: 0.5% FS
• Probe Material: 316 stainless steel (corrosion-resistant)
• Cable Material: Polyurethane (PU) Ventilation Cable (Oil and Acid Resistant)
• Protection Level: IP68 (Fully Waterproof, Can be Immersed for Long Term)
• Operating Temperature: -20~80 ° C
• Output Signal: RS485 Modbus RTU

HA Automation Scene

• Automatic Water Tower Water Replenishment: Liquid Level 90% → Stop Water Replenishment
• Low Water Level AlarmLiquid level<10% → push alarm "water tower about to empty"
• Overflow protectionLiquid level>95% for 5 minutes → emergency valve closure+alarm
• Water consumption statisticsDaily liquid level change → estimate household water consumption

Applicable scenarios

• Family water towerMonitoring the liquid level of water towers in villas/rural areas
• fire poolEnsure that the water level of the fire water pool always meets the standard
• sewage poolPump station collection well liquid level monitoring, automatic start stop of sewage pump
• Agricultural irrigation pondReservoir level monitoring+irrigation pump linkage

🛒 Purchase and Consultation

The MODBUS products introduced in this article can be purchased through official channels.

📍 Modbas Intelligence| 12th Floor, Tower A, Langqing Plaza, Guanyin Bridge, Jiangbei, Chongqing, China
📞 Phone:+86-18801054468
📧 Email: iot@modbus.com | 🌐 Official website:www.modbus.cn
📱 Search for "Modbus Debugging Assistant" on WeChat Mini ProgramModbus Debugging Assistantto learn more about product information