NT1 NOx measuring system

NT1 is LAMTEC's microprocessor-based NOx transmitter for the KS2DNOx combination probe. It simultaneously measures O₂ concentration and nitrogen oxides in flue gas from combustion plants operating with excess air (λ > 1); the NOx reading is the sum of NO and NO₂. Measurement takes place in situ in the moist flue gas, with no sample gas conditioning. The readings are used for monitoring and optimisation.

NT1 is operated from a 5.7-inch resistive touch panel on the front door, which handles password entry, NOx and O₂ values and trends, probe, fuel, warning and fault information, calibration, analogue and digital output settings, LSB activation and USB logging settings. There are three versions: one for a single probe with LSB, and two without LSB for up to two or up to four probes. The LSB version can work together with other LAMTEC systems. Up to 8 analogue and up to 12 digital outputs can be connected, and the USB port on the panel is for continuous logging of measurement data.

With the GED BASE gas extraction device, the KS2DNOx probe measures at up to 550 °C and up to 100 mg/Nm³ of dust; with GED FLEX, at up to 1400 °C depending on material and, with purging, up to 1000 mg/Nm³ of dust. O₂ accuracy is ±8 % of reading (not better than ±0.2 vol.%) and NOx accuracy ±10 % of reading (not better than ±3 ppm); the t60 response time is under 10 s for both O₂ and NOx. NT1 runs on 120…230 V AC, has IP65 protection and operates at 0…+50 °C; it is ready to measure about 10 minutes after mains on, or 60 minutes after first commissioning of the probe.