Inquiry Onsite Environment with a FREE Call from Your Mobile Phone!
Interval Report Onsite Environment to Your Mobile Phone by SMS!
Remote Reset, Remote Reboot, Automatic Reboot Periodicity!
​High-Low Temperature Voltage with SMS Alert!

Support  Modbus RTU Over TCP for Cloud Monitoring!
 Download Brochure

The GSM 3G 4G LTE Temperature Monitoring Alarm is special for remotely monitoring onsite temperature, power status through wireless GSM/3G/4G Network. When the temperature, power voltage exceed high threshold or low threshold value, will send SMS alert to upto 10 preset mobile phone immediately.
Just dial from Authorized User number, the GSM 3G 4G LTE Temperature Monitoring Alarm will reject at the first “Ring”, no communication cost, and then return the current temperature,power status or voltage. Moreover, it can report onsite environment interval or daily.

The GSM 3G 4G LTE Temperature Monitoring Alarm can be used for solar power monitoring, DC power voltage monitoring, temperature monitoring, Class Room, Public Room, Waiting Room, Hospital, Stations, Fresh Food Warehouse, Office, Meeting Room, Laboratory, Library and anywhere that need monitoring temperature or control temperature in expected range.

Mainly Features of 4G Temperature Monitoring Alarm:

1.    Can be operated from anywhere, no distance limitation;

2.    No call charges for inquiry. the GSM 3G 4G LTE Temperature Monitoring Alarm rejects the call from authorized number then return onsite temperature and power voltage on the first 'ring';

3.    Multiple applications. (temperature, power status, solar panel, dc voltage);

4.    Up to 10 authorized phone numbers, 5 can be used to receive call or SMS,and 5 can be used to call and SMS while alarm occurrence;

5.    One DS18B20 temperature sensor input, measures temperatures from -55-+125°C,0.5°C accuracy from -10-+85°C;

6.    External AC Power status monitoring, AC On/OFF will send SMS to authorized phone numbers;

7.    Inbuilt MCU monitoring the DC input Voltage value, measure range is 9-24VDC, no need additional sensor to save cost;

8.    Timer Report—Can setup every x hours automatically send its status/Value to the authorized numbers;

9.    Support remotely read historic data via SMS;

10. Support Modbus TCP and Modbus RTU Over TCP protocol for cloud monitoring;

11. Rechargeable Backup Battery inside can last 8hours;

12. Secure - Using caller ID and password for identification, unknown callers are ignored;

13. Programmable by SMS Commands or APPs with password protection;

14. Based on GSM/3G/4G Network, applied to many applications.

15. Remote Reset via SMS, Remote Reboot via SMS, Automatic Reboot Periodicity.

Specifications of the 4G Temperature Monitoring Alarm:

Parameter item	Reference scope
DC Power supply	9~36VDC, recommend 12VDC1A
Power consumption	12V input  Max. 50mA/Average30mA
Frequency range	2G :850/900/1800/1900Mhz 3G :W :900/2100Mhz  C :850/1900Mhz  T :850/2100Mhz  4G LTE
SIM Card	Supporting 3V SIM Card
Antenna	50 Ω SMA Antenna interface
Temperature range	-55-+125 °C
Accuracy	Accuracy 0.5°C from -10-+85 °C
Temperature Sensor	Temperature Sensor, Model :DS18B20 ,Temperatures from -55-125°C（0.5°C accuracy from -10-+85 °C ).
Backup Battery	900mAH, last 8hours
Exterior dimension	L70mm*W88mm*H30mm
Net Weight	300 g

User Manual 

---

Brochure 

---

Original Photo for Distributors 

---

Complete Catalog  

---

SMS APP QR Code：

（Scan the QR code to download）

  （Apple Store search: RTU5023）
 

Typically applications:

1.      BTS Monitoring;

2.      Security Alarm System applications;          

3.      Supervision and monitoring alarm systems;

4.      Automatic monitoring system;             

5.      Vending Machines security protection;

6.      Pumping Stations, Tanks, Oil or Water levels;

7.      Buildings and Real Estate;

8.      Weather Stations; 

9.      River Monitoring and Flood Control;

10.   Oil and gas pipelines;  

11.   Corrosion protection

12.   Temperatures, water leakage applications;

13.   Wellheads, boat, vehicle;

14.   Energy saving, street lights control system;

15.   Valve controls;

16.   Transformer stations;   

17.   Unmanned machine rooms;

18.   Control room application;

19.   Automation System, M2M;

20.   Access Control System;

21.  PLC Gateway, PLC Remote Monitoring.