Sauermann Si-CA 130 Elite Combustion Flue Gas Analyser – Printer Kit Multi-Gas Combustion Analysis for Residential & Commercial Systems The Sauermann Si-CA 130 Elite Printer Kit is an advanced combustion flue gas analyser in a compact, ergonomic package, built for residential and commercial gas system monitoring. The base unit ships with two field-replaceable sensors — O₂ and CO (up to 8,000 ppm) — with NO or low-range NO available to add a third sensor for accurate NOx measurement, including in low NOx or high moisture environments. Built-in diagnostics such as sensor life indicators and calibration reminders help minimise downtime. The analyser calculates CO₂ percentage, combustion efficiency and excess air, and measures draft and differential pressure. It also monitors CO and CO₂ in ambient air, giving a combined safety and perfo