Off-Gas System BMT 964 OG

Summary

Product Identification

The OZONE-IN-OFF-GAS ANALYZER is an ozone analysing system for moist ozone off-gas, consisting of:

• UV-photometric ozone analyser (BMT 964)
• Peltier-electric sample gas dryer (DH5)
• Ozone-resistant sample gas pump (SGP-5)

Features

• Off-gas drying at the sample point
• Prevents condensation in the sample line
• Peltier-electric cooling
• Automatic condensate removal
• Ozone-resistant sample gas pump
• Low flow warning
• Ozone catalyst can be avoided
• Measurement ranges down to 5 g/Nm³
• Long-life mercury lamp
• Warranty: 3 years (5 years on UV lamp)
• High accuracy: error < 0.5%
• Pressure and temperature compensated
• Built-in sample gas filter
• Built-in purge unit for automatic zeroing
• Display units: g/Nm³, %wt/wt, or ppmv
• Timing sequence for automatic zeroing
• Outputs: 4-20 mA and 0-10 V isolated

Applications

• Ozone measurement in moist sample gas
• Municipal off-gas measurement
• Ozone measurement at atmospheric or sub-atmospheric sample pressure

Specifications

Measurement Principle

• Dual-beam UV photometer (254 nm), no moving parts

Reliability

• MTBF (instrument incl. UV lamp): 65,000 h
• MTBF (excl. UV lamp): 120,000 h

UV Lamp

• Low pressure mercury lamp, long life design, burnt-in for 300 h

Display

• 16 character alphanumeric backlit LCD

Concentration Ranges

• Standard: 50, 100 g/Nm³
• Optional: 5, 10, 20 g/Nm³
• Selectable units: g/Nm³, %wt/wt, ppmv

Accuracy

• Maximum error after zeroing: sum of 0.4% of measurement + 0.1% of scale
• Repeatability error: 0.2% of measurement
• Zero drift: typically 0.2% of range per day (after warm-up, non-cumulative)

Operating Limits

• Maximum inlet pressure: 1 bar above pressure range
• Ambient temperature (ozone analyser): 0 - 50°C (non-condensing)
• Ambient temperature (dryer): Contact factory

Materials in Contact with Ozone

• Quartz (cuvette windows)
• Al₂O₃ (cuvette)
• FFPM (window seals)
• PTFE (tubing)
• Stainless steel (fittings, cuvette spacer)

Gas Ports

• Inlet gas port: for 3x5 mm (1/8" x 3/16") tubing; optional 4x6 mm, 1/8'', 1/4'', or 6mm Swagelok
• Outlet gas port: for 4x6 mm tubing

Flow Rate

• Typical: 0.5 l/min

Compensation

• Temperature compensation: Standard
• Pressure compensation: Built-in cuvette pressure transducer; absolute pressure range 1.15 bara (optional 1.5 or 2.0 bara); selectable units: bar, psi, Torr, MPa

Outputs and Controls

• Signal outputs:
  • Concentration: 4-20 mA (isolated, active)
  • Concentration: 0-10 V (isolated)
• Concentration alarms: High Alarm, Low Alarm (latching, non-latching)
• Control input: Set to zero (24 V, 18 mA, isolated)
• Control outputs (relay contacts, 28 V, 0.5 A, isolated): Lamp Low, Cuvette Dirty, High Alarm, Low Alarm
• Error handling (Error Relay, 30 V, 1 A): Summarizes instrument failures
• Warnings and errors: Lamp Low Warning/Error, Lamp Off Error, Cuvette Dirty Warning/Error, Overrange, Overpressure

Interface and Software

• Serial interface: RS-232, bidirectional, 2400 - 38400 Baud
• Automatic zeroing: With internal purge pump and solenoid valve
• Software: BMT 964 Link (instrument configuration and log readout on Windows PC)

Power

• Wide range input: 100 - 240 VAC
• Power consumption: 200 VA

Mechanical

• Dimensions (W x H x D): 400 x 300 x 120 mm
• Weight: Approx. 6.5 kg
• Cabinet: Wall mount aluminum cabinet, yellow powder coating

Compliance

• CE-marked (EMC & safety)
• cTUVus NRTL-listed

Sample Gas Pump (SGP-5)

• Stroke: ± 0.7 mm
• Motor: Brushless DC motor
• Performance: 0.5 l/min at zero pressure head; 0.35 l/min against 100 mbar pressure head
• Systemic pressure restriction: May not be lower than 100 mbar below atmospheric; may be up to 1 bar higher than atmospheric.

Sample Gas Flow Meter

• Ozone resistant thermal mass flow meter
• Low flow warning: Activated below approximately 0.3 l/min

Sample Gas Drying (DH5)

• Drying is achieved by cooling the sample gas using a Peltier cooler.
• Internal cooler temperature: Approximately +1°C.
• Function: Removes water vapor to prevent condensation and can also reduce other vapors with dew points higher than the cooler temperature.

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Disclaimer This extracted summary may omit figures, footnotes, or revisions. Contractual data must match the official OEM PDF revision used for the project.

Official datasheet (PDF)

Lenntech datasheet mirror