Laser gas analysis
Fields of application
The ZSS laser gas analyser is designed for waste incinerators, district heating, industrial boilers and chemical plants.
Features
The laser gas analyser (ZSS) enables continuous measurement of HCl in flue gases in waste incineration plants and industrial waste disposal facilities, NH3 in power plants and denitration plants, CO, CO2 and O2 in steel and chemical plants, with extremely rapid response. As the ZSS is installed directly on the stack through which the gas to be analysed passes (in situ installation), gas conditioning is not required. Highly tolerant to dust, the ZSS can be installed upstream of filtration systems where extractive measurement is generally difficult.
| General | |
| Principle | Laser |
| Method | In-situ |
| Measurable components and ranges | Please refer to the table below |
| Light source | Near-infrared semiconductor laser |
| Laser class | CLASS 1 (High-temperature version and version with air purge of O2 analysers correspond to CLASS 3B) |
| Power supply | 100-240 Vac, 50/60 Hz |
| Power consumption | 80 VA |
| Calibration interval | Every 6 months (depending on operating environment) |
| Display | Backlit LCD |
| Information displayed | Component, concentration (instantaneous value, average, corrected instantaneous O2 value, corrected average O2 value), alarm |
| Weight | Receiver and transmitter: approx. 10 kg each Controller: approx. 8 kg |
| Dimensions | Receiver (400 (D) x 180 (W) x 155 (H) mm) Transmitter (400 (D) x 240 (W) x 160 (H) mm) Controller (137 (D) x 255 (W) x 440 (H) mm) |
| IP index | IP65 |
| Performance | |
| Answer | ≤ 4 s (≤2 s for high-speed version) |
| Repeatability | ≤ ± 1.0% FS (depending on components and scales) CO + O2 measurement: ±2% FS |
| Linearity | ≤ ± 1.0% FS (depending on components and scales) CO + O2 measurement: ±3% FS |
| Zero drift | ≤ ± 2.0% FS for 6 months (depending on component and scale) CO + O2 measurement: ± 4% FS for 6 months |
| Effect of interference | ≤ ± 2.0% PE |
| Detection limit | ≤ 1% of minimum scale |
| Input/output signals | |
| Analog outputs | 4-20 mAcc or 1-5 Vcc, 2 or 4 points Measured and corrected O2 values. Possibility of switching between instantaneous and average values |
| Analog inputs | 4-20 mAcc, 2 points Sample gas pressure, temperature, flow velocity, O2 content, water concentration, air purge pressure *Inputs are used for concentration compensation, O2 correction and alarm output. |
| Digital outputs | Relay contact output, 6 points Low light transmission, high/low limit alarm, fault analyser, calibration in progress/measurement in progress, power failure, installation fault |
| Digital inputs (optional) | Photocoupler voltage input, 3 points Reset of average value, alternation between instantaneous value and sliding average value, maintenance of remote measurement |
| Installation environment | |
| Ambient temperature | -20 to +55 °C (receiver, transmitter) -5 to +45 °C (controller) |
| Ambient humidity | ≤ 90% RH |
| Optical path length | 0.5 to 10 m (0.5 to 5 m for CO + O2 measurement) |
| Standard flange | JIS 10K, 50A, 100A, DN50/PN10 or ANSI # 150 2B |
| Purge gas | See table below. Purge gas pressure : ≥ 0.3 MPa |
| Purge gas flow | ≥ 20 L/min |
| Gas conditions | See table below Humidity: ≤50 %vol (non-condensing) Pressure: ± 10 kPa (Consult us for pressures above the limit.) Dust: Standard version: ≤5 g/m3 (N) High-dust version: ≤20 g/m3 (N) |
| Measurable components and ranges | |||||||
| analyser single beam 1 component | Measurable components | Scale min.* | Max. scale* | Gas temperature | Purge gas | 4th code | |
| HCl | 10 ppm | 5000 ppm | ≤ 400 °C | Air instrument | C | ||
| NH3 | 15 ppm | 5000 ppm | ≤ 450 °C | W | |||
| CO (high scale) | 2.0%vol | 100%vol | ≤ 300 °C | A | |||
| CO (low scale) | 200 ppm | 1%vol | ≤ 400 °C | Mr. | |||
| 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 | Q | |||
| O2 (instrument air purge) | 25%vol | 100%vol | 400 °C ... 1200 °C | Air instrument | T | ||
| analyser single 2-component harness | CO + CO2 | 2.5%vol | 100%vol | ≤ 300 °C | Air instrument | K | |
| analyser dual 2-component harness | ppm CO + O2 (instrument air purge) | CO | 200 ppm | 2%vol | 400 °C ... 1200 °C | Air instrument | V |
| O2 | 25%vol | 100%vol | |||||
| ppm CO + O2 (high-temperature) • vol % CO + O2 | CO | 200 ppm | 2%vol | ≤ 1200 °C | N2 | U | |
| O2 | 5%vol | 50%vol | |||||
| %vol CO + O2 | CO | 2%vol | 50%vol | ≤ 300 °C | S | ||
| O2 | 10%vol | 100%vol | |||||
*The measurement ranges described above are for the optical path of 1 m.
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