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Lefoo Wireless Submersible Liquid Level Transmitter LFT3600

This wireless submersible liquid level transmitter features NB-IoT connectivity for wide coverage, low power use, and reliable data transmission. A 19,000 mAh lithium battery ensures long-term operation. It supports magnetic wake-up, cyclic data storage, real-time remote monitoring, Bluetooth configuration, and alarm notifications. Ideal for smart water networks, buildings, utilities, and industrial IoT.


Features

Equipped with an NB-IoT module: Wide coverage, multiple connections, high speed, low power

consumption, and superior architecture.

Large 19000mAh capacity for extended battery life: Low power consumption/lithium-thionyl

chloride battery makes battery swapping worry-free.

Contactless panel, magnetic wake-up: No buttons required, simply swipe the magnetic panel across

the screen to wake it up.

Circular data storage: Offline data is automatically stored to prevent data loss.

Real-time data acquisition, wireless remote transmission: Real-time data monitoringvia PC and

mobile devices.

Data storage: Multiple functions including data recording, storage, and export.

Upper and lower limit/threshold alarms: PC webpage alerts or WeChat push notifications.

Local Bluetooth settings: Communicate with the device via mobile phone Bluetooth to set parameters.



Specification of Wireless Submersible Liquid Level Transmitter LFT3600

Technical parameter

Specification of Wireless Submersible Liquid Level Transmitter LFT3600
Measuring Range0~1...200mH₂O
Accuracy±0.5%F.S
Overload Pressure1.5 times rated pressure
Pressure FormGauge G
Measured MediumGases or liquids compatible with 304 and 316L stainless steel, fluororubber, or nitrile rubber.
Operating Temperature-20℃~70℃
Storage Temperature-40℃~85℃ (without battery)
Power Supply

NB-IoT: 3.6V@19Ah (disposable lithium-ion battery);

4G: 3.6V@19Ah (disposable lithium-ion battery)/10~30VDC

Power ConsumptionAverage transmit current ≤100mA@3.6VDC; Sleep current ≤20uA@3.6VDC;
Pressure InterfaceSubmersible/M20x1.5 mounting
Communication MethodNB-IoT / 4G
Communication BandNB-IoT: B5/B8; 4G: Full network compatibility
Communication protocolMQTT
SIM cardNano SIM (12.3mm x 8.8mm x 0.67mm)
ButtonsContactless panel interaction
Configuration methodLocal Bluetooth
Reporting cycleAdjustable from 1 to 1440 minutes, default 120 minutes
Sampling cycleAdjustable from 10 to 600 seconds, default 60 seconds
Pressure alarmUpper limit, lower limit, and dynamic change thresholds for liquid level can be set
Protection levelIP65
Antenna typeBuilt-in horn antenna / external suction cup antenna
Weight1.9kg

Dimension



Features of Wireless Submersible Liquid Level Transmitter LFT3600

  • Equipped with an NB-IoT module: Wide coverage, multiple connections, high speed, low power consumption, and superior architecture.


  • Large 19000mAh capacity for extended battery life: Low power consumption/lithium-thionyl chloride battery makes battery swapping worry-free.


  • Contactless panel, magnetic wake-up: No buttons required, simply swipe the magnetic panel across the screen to wake it up.


  • Circular data storage: Offline data is automatically stored to prevent data loss.


  • Real-time data acquisition, wireless remote transmission: Real-time data monitoring via PC and mobile devices.


  • Data storage: Multiple functions including data recording, storage, and export.


  • Upper and lower limit/threshold alarms: PC webpage alerts or WeChat push notifications.


  • Local Bluetooth settings: Communicate with the device via mobile phone Bluetooth to set parameters.

Applicationa of Wireless Submersible Liquid Level Transmitter LFT3600

Widely used in smart IoT:


  • Integrated utility tunnel environmental monitoring


  • Intelligent monitoring of drainage/water supply networks


  • Smart healthcare


  • Water supply network monitoring


  • Intelligent monitoring of fire-fighting water systems


  • Smart industrial parks


  • Building intelligence


  • Industrial IoT


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