Laser Gas Analyser

ZSS laser gas analyzers provide innovative combustion optimization technology - perfect for incinerators, industrial boilers, power, steel and chemical plants.

ZSS Laser Gas Analysers

Insertion type offers high-speed measurement.

Long-term stability and low maintenance.

ZSS Laser Gas Analysers for: waste incinerators, district heating and industrial boilers, chemical plant.

NH₃ - HCI - CO - O₂ - CO₂ - CH₄

ZSS Laser gas analysers provide continuous measurement of gas concentration

CO and O₂ with ZSS dual beam TDL analyser (ZSS-D)
HCl, NH_3,CO, CO₂ and O₂ with the ZSS single beam analyser (ZSS-S)

Features

Laser Technology: high precision
Compact size
Easy maintenance
Fast response

Absorption spectrum

The analyser uses near infrared semiconductor laser and measures the change in absorption wavelength to determine the gas concentration.

Energy saving and low maintenance

No sampling involved - No filter
No preconditioning - No catalyst

Energy consumption ≤ 80 VA
Maintenance work ≤ twice a year
With no need for sampling devices and preconditioning, consumable parts and maintenance work are greatly reduced.

Zero point stability

±2.0% FS per 6 months

Purge system reduces the risk of zero drift due to contamination

Fast response within 2 seconds

Compared to the ion electrode (sampling) method, the direct measurement provides remarkably faster response.

CO + O2 analyser available

Simultaneous measurement of CO and O₂ enables precise control of air-fuel ratio while reducing the cost of installation and maintenance.

ppm CO + O₂ (high-temperature)
vol% CO + O₂
ppm CO + O₂ (instrument air purge)
CO + CO₂

Instrument air purge available

O₂ analyser for combustion control accepts instrument air purge.

Specifications

General
Principle	Laser
Method	Cross-stack
Measurable components and ranges	See the table below
Light source	Near-infrared semiconductor laser
Laser class	CLASS 1 (O₂ analysers of high-temperature version and instrument air purge version fall under CLASS 3B)
Power supply voltage	1001-240 V AC, 50/60 Hz
Power consumption	80 VA
Calibration interval	every 6 months (depending on the operating environment)
Display	Backlit LCD
Display contents	Component, concentration (instantaneous value, average, O₂ corrected instantaneous value, O₂ corrected average value), alarm
Weight	Receiver unit and transmitter unit: approx. 10 kg each, control unit: approx. 8 kg
Dimensions (D x W x H)	Receiver unit (400 x 180 x 155 mm) Transmitter unit (400 x 240 x 160 mm) Control unit (137 x 255 x 440 mm)
IP rating	IP65

Performance
Response	≤ 4 s (≤ 2 s in high-speed version)
Repeatability	±1.0% FS (depending on components and ranges) CO + O₂ measurement: ±2% FS
Linearity	±1.0% FS (depending on components and ranges) CO + O₂ measurement: ±3% FS
Zero drift	±2.0% FS per 6 months (depending on component and range) CO + O₂ measurement: ±4% FS per 6 months
Interference effect	±2.0% FS
Detection limit	1 % of minimum range

Input/output signal
Analog output	4-20 mA DC or 1-5 V DC, 2 or 4 points Measured value and O₂ corrected value. Switchable between instantaneous value and average value
Analog input	4-20 mA DC, 2 points Sample gas pressure, temperature, velocity, O₂ concentration, water concentration, air purge pressure *Inputs are used for compensating concentration, O₂ correction, and alarm output.
Digital output	Relay contact output, 6 points Low light transmission, H/L limit alarm, analyser error, during calibration / during hold, power interruption, environmental error
Digital input (option)	Voltage input received by photocoupler, 3 points Average value reset, switchover between instantaneous value and moving average value, remote hold

Installation environment
Ambient temperature	-20 to +55°C (Receiver unit, transmitter unit) -5 to +45°C (Control unit)
Ambient humidity	90% RH
Optical path length	0.5 to 10 m (0.5 to 5 m in CO + O₂ measurement)
Standard flange	JIS10K, 50A,100A, DN50/PN10 or ANSI # 150 2B
Purge gas	See the table below. Purge gas pressure: > 0.3 MPa
Purge gas flow rate	> 20 L/min
Gas conditions	See the table below Moisture: < 50 vol% (no condensation) Pressure: ±10 kPa (Consult us for pressure above the limit.) Dust: Standard version: < 5 g/m³ (N) Dust resistant version: < 20 g/m³ (N)

Measurable components and ranges

	Measurable components		Min. range*	Max, range*	Gas temperature	Purge gas	4th code
Single beam 1 component analyser	HCI		10 ppm	5000 ppm	≤400°C	Instrument air	C
	NH₃		15 ppm	5000 ppm	≤ 450°C		W
	CO (high range)		2.0 vol%	100 vol%	≤ 300°C		A
	CO (low range)		200 ppm	1 vol%	≤ 400°C		M
	CO₂		2.0 vol%	100 vol%	≤ 300°C		G
	CH4		100 ppm	100 vol%	≤ 300°C		R
	O₂		10 vol%	100 vol%	≤ 300°C	N₂	P
	O₂ (high temperature)		4 vol%	100 vol%	≤ 1200°C	N₂	Q
	O₂(instrument air purge)		25 vol%	100 vol%	400°C…1200°C	Instrument air	T
Single beam 2 components analyser	CO + CO₂		2.5 vol%	100 vol%	≤ 300°C	Instrument air	K
Double beam 2 components analyser	ppm CO + O₂ (instrument air purge)	CO	200 ppm	2 vol%	400°C ... 1200°C	Instrument air	V
	ppm CO + O₂ (instrument air purge)	O₂	25 vol%	100 vol%	400°C ... 1200°C	Instrument air	V
	ppm CO + O₂ (high temperature)	CO	200 ppm	2 vol%	≤ 1200°C	N₂	U
	ppm CO + O₂ (high temperature)	O₂	5 vol%	50 vol%	≤ 1200°C		U
		CO	2 vol%	50 vol%	≤ 300°C		S
	vol% CO + O₂	O₂	10 vol%	100 vol%	≤ 300°C		S
*The measurement ranges described above are for the optical path of 1 m.