Ozone Monitor BMT 932

Summary

Product identification

• Product Name: OZONE MONITOR BMT 932
• Manufacturer: BMT MESSTECHNIK GMBH
• Type: Ambient Ozone Monitor, Low Concentration

Features

• Dual beam UV photometer
• 3 years warranty
• Long-life mercury lamp (5 years warranty)
• High accuracy, error less than 1%
• Resolution: 0.001 ppmv
• Pressure and temperature compensated
• Available ranges: 1 to 250 ppmv
• 19'' rack mount, or cabinet versions
• Traceable to international standard (NIST)
• Available in 1, 3, or 6 channel versions
• Two individual threshold alarm levels per channel
• Three configurable EMO outputs
• Cycle time: 20 s per channel
• Dual scrubber system (utility + reserve)
• Integrated ozone generator for automatic utility scrubber testing (every 24 hours)
• Automatic reserve scrubber takeover upon utility scrubber failure
• Sample gas flow: 1 l/min, automatically controlled via an electronic flow meter
• Configuration via front panel or Windows PC software
• Complete error and event log with timestamps

Applications

• Monitoring of ozone in ambient air
• TLV monitoring (Threshold Limit Value)
• Ambient monitoring in ozone plants
• Vent-Gas monitoring

Specifications

Measurement principle

• Dual-beam UV photometer (254 nm)

UV lamp

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

Display

• Alphanumeric LCD 2x20 char.

Concentration ranges

• 1 ppmv (1.000 ppmv), 2.000, 5.000, 10.000, 20.00, 100.0 and 250.0 ppmv

Noise

• ±0.001 ppmv

Minimum detectable concentration

• 0.002 ppmv

Accuracy

• Maximum error (traceable to NIST) is the sum of: 0.8% of measurement + 0.2% of scale

Response time

• 20 s (0 - 95 %)

Temperature and pressure compensation

• Standard

Flow rate

• 1 l/min, automatically controlled by an electronic flow meter

Sample ports

• 1, 3 or 6 (automatic and manual selection)

Scrubber life

• 8 years (safety monitor operation)

Threshold alarms

• Two individual alarm thresholds per channel
• 3 EMO outputs controlled by any combination of alarms

Error relay

• Indicates instrument failure, including:
  • Lamp low (easy lamp replacement)
  • Low flow
  • Scrubber failure (tested every 24 h, reserve scrubber takes over automatically)

Warmup time

• Maximum 7 min., typical 4 min.

Gas ports

• Compression type for ¼" PFA/FEP/PTFE tubing (Cabinet: ¼" One-Touch Fitting)
• Safety catalyst for off gas included

Signal outputs

• Concentration: 4-20 mA (isolated, active)
• Concentration: 0-1 V, 0-10 V (isolated)
• Sample port identification by binary output
• Option: 932-RELAY with contacts identifying each port plus its low/high alarm, accessed by 50-pole D-Sub connector

Control output

• Lamp low (relay contact, 30 V, 1 A)

Digital interface

• RS-232, isolated, showing concentration and error messages
• Link Mode commands for full control from Windows PC or PLC

Accessories kit (included)

• One filter holder & one mounting fitting for filter holder per sample port
• 200 filter inserts

Spare parts (available)

• UV lamp, scrubber, filter holder

Power

• Universal line voltage: 100 - 240 VAC, 35 VA, 50/60 Hz
• Optional: 18-36 VDC, 25W (19” rack mount)

Ambient temperature

• 0 - 45°C (non-condensing)

Cabinet version

• IP65, NEMA 4X

Physical dimensions and weight

• 19" rack mount version:
  • Dimensions (H x D): 132 x 300 mm
  • Weight: 9 kg
• Cabinet version (BMT 932 C):
  • Dimensions (W x H x D): 357 x 440 x 133 mm
  • Weight: 7 kg
  • Mounting: Wall mount with brackets (four mounting holes 6 mm ID, spaced 307 x 397 mm, W x H)

Compliance

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

Filters

• Filter inserts are made of fine pure glass fibre felt to remove aerosol particles without affecting the ozone.
• Filters should be replaced on a regular basis, with the optimum interval determined by the user for their specific situation.

Disclaimer: This extracted summary may not include all figures, footnotes, or revisions. Contractual data must match the official OEM PDF revision used on the project.

Official datasheet (PDF)

Lenntech datasheet mirror