What is Line A? Line A is a self-contained TDLAS measurement node designed for integration inside OEM instruments. It handles the laser driving, optical absorption, and 2f/1f signal processing, providing a calibrated gas concentration output via digital or analogue interfaces.

Product Overview

The Line A module is the core measurement engine for instrument manufacturers building high-precision methane analysers. Unlike NDIR sensors, Line A uses a single-line TDLAS principle that is immune to cross-gas interference and does not drift with humidity or temperature.

Line A OEM module schematic showing 140x110x96mm dimensions and interface layout
Figure 1: Line A OEM module physical dimensions and optical path layout.

Technical Specifications

ParameterSpecification
Target GasCH4 (Methane)
Measurement Range0-100% vol
Accuracy+/-2% Full Scale
Response Time (T90)<=10 seconds
Detection Limit5 ppm
Operating Temperature-20C to +60C
CommunicationRS485 (Modbus RTU) / UART / 4-20 mA
Power SupplyDC 12V (9-18V range), <=3W
Dimensions140 x 110 x 96 mm

Key Advantages for OEM Integration

  • No Cross-Sensitivity: Targeted laser wavelength eliminates interference from CO2, C2H6, and H2O.
  • Long-Term Stability: TDLAS physics-based measurement targets 5-year calibration intervals.
  • Low Power Consumption: Efficient laser and TEC control electronics suitable for portable instruments.
  • Documented Interfaces: Complete protocol documentation and entity parameters for type examination support.