Tianlan Optoelectronics

In-situ NOₓ / O₂

In-situ NOₓ and Oxygen Analysis

Measure NOₓ and oxygen at the process, with distributed monitoring for a clearer view of SCR conditions.

Measures: NOₓ · O₂
Principle: Direct in-situ measurement
Manufacturer: Tianlan Optoelectronics

In-situ NOₓ and Oxygen Analysis — In-situ instrument · Photograph from the supplied SCR presentation

Measurements at the process

The supplied SCR material describes direct NOₓ and O₂ measurement using a zirconia sensing approach. Multiple measurement positions can help describe the distribution across the duct.

Measure at the process location without an extractive sample-transfer line for these channels.
Associate NOₓ and oxygen measurements with flow and control-zone information.
Review temperature, duct geometry, mounting and maintenance access.

Installation and selection

Sensor selection, operating conditions and response criteria belong in the technical specification. This page covers the NOₓ/O₂ configuration described in the supplied material.

Instrument specifications

NOₓ/O₂ instrument — supplied SCR presentation, slide 8
Detector	Dual-cell thick-film zirconia detector
NOₓ ranges	0–100 ppm or optional 0–1,500 ppm
O₂ range	0–21.00%
Linearity error	NOₓ: ±1.5% of full scale; O₂: ±1.5% of full scale
Repeatability	NOₓ: ±1.5% of full scale; O₂: ±1.5% of full scale
Stability over 7 days	NOₓ: ±2.5% of full scale; O₂: ±1.5% of full scale
Response time	T90 <10 seconds after full warm-up

Application and signal interfaces

Operating application described on slide 7
Described flue-gas application	Continuous measurement in SCR flue gas at 350–450 °C
Mounting arrangement	Direct duct or stack mounting; measurement positions selected for each control zone
Plant interface	RS-485 or 4–20 mA signals to the DCS

Technical enquiry

Ask the team for the current technical data sheet and application-specific configuration.

TLG-300 in-situ measurement family

The updated brochure covers distributed in-situ measurement and SCR control applications, with RS485 or 4–20 mA connection to the DCS.

Product brochure

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