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Item specifics
  • Brand Name: KING PIGEON
  • Model Number: RTU5023
  • SMS Temperature alarm Frequency range: 850/900/1800/1900Mhz
  • SMS Temperature alarm range: -40 ~ +80 centigrade
  • SMS Temperature Humidity alarm range: Relative humidity 0~90% (condensation free)
  • SMS GSM Environment Alarm Antenna: 50 Ω SMA Antenna interface
  • SMS Temperature Monitoring SIM Card: Supporting 3V SIM Card
  • SMS Temperature Power consumption: 12V input Max. 50mA/Average30mA
  • SMS Temperature DC Power supply: 9~24VDC, recommend 12VDC1A
  • Eletronic Power Monitor Backup Battery: 900mAH, last 8hours
  • SMS Temperature Exterior dimension: W130mm*D74mm*H27mm
  • SMS Temperature Application: for remote monitor onsite temperature, humidity, power status
Product Description

Model: RTU5023

Name: GSM Environment Alarm


Inquiry Onsite Environment with a FREE Call from Your Mobile Phone!

Interval Report Onsite Environment to Your Mobile Phone by SMS!

High-Low Temperature Humidity Voltage with SMS Alert!



The GSM SMS Environment Alarm is special for remotely monitoring onsite temperature, humidity, power status through wireless GSM

Network. When the temperature, humidity, power voltage exceed high threshold or low threshold value, will send SMS alert to upto 10 preset

mobile phone immediately.

The GSM Environment Alarm can be used for solar power monitoring, DC power voltage monitoring, temperature monitoring, humidity 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 the GSM Environment Alarm:

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

2.    No call charges for inquiry. the GSM Environment Alarm rejects the call from authorized number then return onsite temperature, humidity,

        and power voltage on the first \'ring\';

3.    Multiple applications. (temperature, humidity, 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 Temperature & Humidity sensor input, measures temperatures from -40-80°C,0.5°C accuracy, Relative Humidity from 0-99RH%,

       accuracy is 3%;

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. Rechargeable Backup Battery inside can last 8hours;

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

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

13. Based on GSM Network, applied to many applications.



      Frequency range850/900/1800/1900Mhz
 Power consumption: 12V input  Max. 50mA/Average30mA
 SIM Card: Supporting 3V SIM Card
 DC Power supply: 9~24VDC, recommend 12VDC1A
 Antenna: 50 Ω SMA Antenna interface
 Temperature range: -40-+80 °C
 Humidity range: Relative humidity 0~90% (condensation free)
 Temp&Humidity Sensor: Temperature&Humidity Sensor, Model :AM2301 ,Temperatures from -40-80°C(0.5°C accuracy),Relative Humidity from 0-99RH%, accuracy is 3%.
 Backup Battery: 900mAH, last 8hours
 Exterior dimension: W130mm*D74mm*H27mm
 Net Weight: 300g
Package List: GSM Environment Alarm X 1
                                 GSM Antenna X 1
                                 Backup Battery X 1 (Inbuilt)
                                 AC/DC adaptor(12V1A) X1
                                 User Manual X 1

       AM2301   Temperature &Humidity Sensor 5m *1

      External antenna AT-25*1

Note: The package does not include any SIM card. And we can have 1m and 10m length sensor. If need, contact us!!!


Here is a Google App, please download for check!


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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.6kg (1.32lb.)
  • Package Size: 15cm x 13cm x 10cm (5.91in x 5.12in x 3.94in)
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Packaging Details
  • Unit Type: piece
  • Package Weight: 0.6kg (1.32lb.)
  • Package Size: 15cm x 13cm x 10cm (5.91in x 5.12in x 3.94in)
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