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Quick Details

  • Products Status: Stock
  • Style: Internal, Internal
  • Type: Wireless
  • Interface Type: Other
  • Transmission Rate: 300-115200bps
  • Certification: CE FCC, CE FCC
  • Brand Name: Mellow
  • Model Number: ML8033
  • Place of Origin: Guangdong, China (Mainland)
  • Working Frequency: 850/900/1800/1900MHz
  • Interface: One 10A&240VAC/30VDC relay With NO/NC output
  • Supply voltage: 6.0V-24.0V
  • Size: 96mm*60*22mm

Packaging & Delivery

Packaging Details Standard Package & OEM Package
Delivery Time 2-10 working days upon receipt of payment


1.Supply voltage 6.0V-24.0V
2.One 10A&240VAC/30VDC relay With NO/NC output
3.850/900/1800/1900MHz frequency
4.GSM RTU Modem

This document defines the ML8033 modem series and describes the hardware interface of the ML8033 modem that connects to the customer application and the hardware interface.

This document can help customer quickly understand module interface specifications, electrical and mechanical details. With the help of this document, associated application notes and user guide, customer can use ML8033 module to design and set up mobile applications quickly.



Technical Parameters


Power supply

Single supply voltage 6.0V – 24.0V (5.0V Customize)

Frequency bands

Quad-band: GSM850, GSM900, DCS1800, PCS1900.

Transmitting power

Class 4 (2W) at GSM850 and GSM900

Class 1 (1W) at DCS1800 and PCS1900

Standby mode average power about 100mW


Text mode

Temperature range

Normal operation: -35°C ~ +80°C

Restricted operation: -45°C ~ -35°C and +80°C ~ +85°C1)

Storage temperature: -45°C ~ +90°C

SIM interface

Port SIM card: 1.8V, 3V.

Hardware Software

Built-in hardware watchdog

32 Bit industrial ARM microprocessor with Free RTOS

With UART interface for firmware upgrade

Relay Output

One 10A&240VAC/30VDC relay With NO/NC output




LED indication (Optional)


1) Red LED: Power indication.


2)Green LED: networks indication.




Module Function


The module is not running(Power Off)

64ms On/800ms Off

The module is not synchronized with network

64ms On/2000ms Off

The module is synchronized with network

64ms On/600ms Off

GPRS data transfer is ongoing






l  Remote Data Monitor and Control

l  Security systems

l  Water, gas and oil flow metering

l  Power station monitoring and control

l  Remote POS (point of sale) terminals

l  Traffic signals monitor and control

l  Fleet management and tracking systems

l  Power distribution network supervision

l  Central heating system supervision

l  Weather station data transmission

l  Hydrologic data acquisition

l  Vending machine

l  Traffic info guidance

l  Parking meter and Taxi Monitor

l  AMR (automatic meter reading) for power,water,gas.oil meter

l  Telecom equipment supervision (Mobile base station, microwave or optical relay station)




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