Design, Support & Management of Metering Systems

Independent metering expertise for the energy, resources, and utilities industry.

MacREJ 5 Advanced Gas Data Logger

The MacREJ 5 is a versatile, ATEX-certified gas data logger designed for smart metering applications. With multi-network connectivity, an advanced graphical display, and robust housing, it delivers secure data acquisition in hazardous zones.

Main Functional Characteristics

  • Operates on 4G LTE and 2G networks with an optional GSM modem
  • Supports NFC, optical interface, and dual RS-485/RS-232 connections
  • 4” backlit graphical display with customizable widget views
  • Intrinsically safe, ATEX-certified for Zone 0, Zone 1, and Zone 2 operations
  • Works with internal or external pressure sensors for flexible measurement
  • Supports NAMUR and SCR encoders for gas meter integration
  • Configurable dual LF pulse inputs for advanced monitoring
  • Durable polycarbonate or aluminium housing with IP-rated protection

About MacREJ 5

The MacREJ 5 is engineered for secure gas data logging in hazardous environments. Its integrated modem ensures reliable 4G LTE or 2G communication. Operators can monitor data trends on-site using the graphical display with widgets showing daily and monthly usage as bar graphs.

It supports Modbus RTU MASTER communication, NAMUR and SCR encoders, and dual LF pulse inputs, allowing seamless integration with gas meters and external sensors. The tamper-resistant housing is available in polycarbonate or aluminium, ensuring long service life and easy installation. Standard lithium D-size batteries provide low operating costs with reliable performance.
IECEx Certification
EN 60529 Compliance

The MacREJ 5 data logger is designed for demanding gas metering applications where secure data acquisition, flexible communication, and hazardous area compliance are critical. It features integrated GSM connectivity supporting 4G LTE and fallback to 2G, along with NFC, optical, RS485, and RS232 interfaces for versatile communication.

The 4” backlit graphical display provides intuitive access to system diagnostics and allows customizable widget views to track daily and monthly usage as bargraphs. The device is ATEX-certified for explosion-hazardous zones up to Zone 0, making it ideal for critical infrastructure monitoring.

It supports NAMUR and SCR encoders, Modbus RTU MASTER communication, and dual LF pulse inputs, enabling seamless integration with gas meters and sensors. The robust polycarbonate or aluminium housing and illuminated terminals ensure durability and easy installation in field conditions.

ATEX Certification – Zone 0, Zone 1, Zone 2 Compliance
EN 60529 Compliance – IP-rated Outdoor Housing Protection

Parameter
Specification
Dimensions / Weight
Version 1: 207 × 194 × 77 mm / 1.3 kg
Version 2: 202 × 167 × 93 mm / 3.5 kg
Housing Material
Version 1: Polycarbonate
Version 2: Aluminium
Humidity Tolerance
Max. 95% at 70 °C
Operating Temperature
–25 °C to +70 °C
Power Supply
One lithium battery (D-size, 3.6 V / 17 Ah), up to 5 years
Display
4” backlit graphical display
Communication Interfaces
NFC, Optical port, RS-485, RS-232
Transmission Standards
4G LTE, 2G GSM (optional GSM modem)
Inputs / Outputs
SpecifiDual LF pulse inputs, NAMUR and SCR encoder supportcation
Protocols
Modbus RTU MASTER, GAZ-MODEM 2/3
Pressure Sensors
Internal or external (optional)
Certifications
ATEX (Zone 0, 1, 2), IP-rated protection

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