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YOKOGAWA DT450G Dust Monitor |
YOKOGAWA DT450G Dust Monitor
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Air pollution control systems such as bag filters and electrostatic precipitators are used to separate particulate or dust from the gas stream before it is exhausted into the atmosphere. To maintain the dust concentration of the emission gas below the specified level through effective operation of the control system, it is essential to continuously monitor the dust concentration of the exhaust gas.
Based on installation and application experiences with the old model DT400G, the microprocessor-based DT450G Dust Monitor features improved operationality and reliability. Features include one-touch automatic range setup in response to process conditions and automatic drift compensation. Also, the DT450G can measure at a process temperature of up to 250℃ , allowing it to cover a wide range of applications. |
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Bulletin for DT450G |
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General Specification for DT450G |
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User's Manual for DT450G |
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Features
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Drift compensation |
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Direct measurement at a process temperature of up to 250℃ |
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One-touch, automatic setup of range appropriate for the process conditions |
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Triboelectric method; probe is stain resistant and requires minimal maintenance |
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Integrated design allows for easy installation |
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Maintenance-free operation for a long period |
Specifications
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Measurement objects |
Solid particles in gas |
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Particle size |
0.3 micrometer or greater |
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Measurement range |
0.1 mg/m3 to 1 kg/m3 |
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Measurementprinciple |
Triboelectric detector |
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Processt conditions |
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Temperature :250℃ or less |
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Pressure: 200 kPa or less |
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Gas flow rate: 4 m/s or greater (Max. flow rate is approx. 30 m/s) |
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Humidity: 40 %RH or less | |
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Measurement range |
Range setup: One-touch automatic setup or manual setup
Note: with one-touch automatic setup function, measurement range is set so that the dust concentration of the process corresponds to a setpoint of setting level. In manual setup, the measurement range is set by gain (x1, x10, x100, x1000, x10000).
Setup range:
DT450G-1; Fixed (20%)
DT450G-3; Variable (10 to 50%, 10% step) |
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Analog output signal (DT450G-3) |
4 to 20 mA DC (isolated, load resistance of 500Ω) |
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Contact output signal |
2 outputs |
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Ambient conditions |
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Temperature: -20 to 45℃ |
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Humidity: 95% RH or less (no condensation) |
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Vibratuin: 5 m/S2 (0.5G) or less | |
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Structure: |
Integrated sensor and converter
Direct insertion type, rainproof (IP64) |
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Materials |
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Sensor probe: Stainless steel (316SS equivalent) |
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Sensor insulation: PEEK |
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Case: Aluminum | |
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Power supply |
100-120 V AC or 200-240 V AC, 50/60 Hz, 8VA |
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Air purge |
Instrument air (dry air) |
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Process pressure |
+50 kPa or greater (continuous) |
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Connection |
Rc 1/4 |
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Air consumption |
Approx. 50 Nl/min |
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Weight |
Approx. 2.3 kg (excluding flange) |
Applications
- Electrostatic precipitators at boilers, incinerators, cement kilns.
- Bag filers at pulverized coal, granulation, sugar, powder milk plants.
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