Liquid Nitrogen Tank Smart Stopper

The Liquid Nitrogen Tank Smart Stopper is a product specially developed for measuring the liquid level and temperature of aluminum liquid nitrogen tanks. It is suitable for liquid level and temperature monitoring needs of all brands of aluminum liquid nitrogen tanks. The product adopts an ultra-low power consumption design, with an LCD screen displaying real-time liquid level and temperature values. The built-in long-life lithium battery can maintain device operation for approximately 2 years. Utilizing ultra-low temperature monitoring technology and IoT communication technology, it monitors the temperature and liquid level inside the liquid nitrogen tank in real time, and can upload data to the cloud platform via multiple communication methods such as LoRa and NB-IoT. This enables remote viewing, remote alarm, and data processing, fully ensuring the safety of sample storage in liquid nitrogen tanks.

Features:
1. Integrated design for more convenient operation
2. Real-time display of temperature and liquid level data
3. High-precision dual independent measurement system for liquid level and temperature
4. Real-time remote alarm system to ensure sample safety
5. Multiple alarm notification methods including SMS, voice call, email, and WeChat
6. Cloud data automatic backup and export functions
7.Ultra-low power consumption design, no external power supply required

Model	SRIM-100B	SRIM-100D	SRIM-200B	SRIM-200D
Communication Method	Lora	Nb-iot	Lora	Nb-iot
Level Measurement Range	–	–	0～643mm（error±5mm）
Temperature Measurement Range	-200～+200°℃(error±1°C）
Suitable For	Compatible with all brands of aluminum liquid nitrogen tanks
Operating Temperature	-20~40°C
Operating Humidity	≤75%(25°C)
Input Power Supply	3.6V
Power Supply Mode	Nickel battery powered (replaceable)
Installation Method	Replacement stopper for liquid nitrogen tank

Note: The LoRa communication method requires a data repeater for networking operation.

The 100 series can monitor temperature;
The 200 series can monitor both temperature and liquid level;
The B series requires a repeater to enable remote monitoring + alarm;
The D series only needs a 4G signal to enable remote monitoring + alarm;