Ozone-in-water Sensor BMT 964 AQ

Summary

Product identification

• Product Name: OZONE-IN-WATER SENSOR BMT 964 AQ
• Product Variants: BMT 964 AQ/HF (for hydrofluoric acid solution), BMT 964 AQ/RD (for use with Remote Display)
• Manufacturer: BMT MESSTECHNIK GMBH

Features

• Dual beam UV photometer (254 nm)
• Long-life mercury lamp
• Warranty: 3 years (5 years on UV lamp)
• High accuracy: error less than 0.5%
• Concentration ranges: 10 to 150 g/m³ (ppmw)
• HF resistant version available for up to 20% hydrofluoric acid
• Relay contact for automatic zeroing control
• Error handling: summary error, lamp low, cuvette dirty, overrange
• Early warnings: lamp low, cuvette dirty
• Programmable via front panel, PC (Windows), or optional Remote Display
• Display units: g/m³ or ppmw
• High and low limit alarms
• Timing sequence for automatic zeroing
• Isolated outputs: 4-20mA and 0-10V
• RS-232 interface (bidirectional, isolated)
• Optional Remote Display (BMT 964 RD)

Applications

• Monitoring of ozone in ultra-pure water
• Monitoring of ozone in water with constant turbidity
• Monitoring of ozone in hydrofluoric acid solution (up to 20% HF for AQ/HF version)
• Semiconductor ozone processes

Specifications

Measurement Principle

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

Reliability

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

UV Lamp

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

Concentration Ranges

• BMT 964 AQ: 10, 50, 100, 150 g/m³
• BMT 964 AQ/HF: 10, 20, 50, 100, 150 g/m³
• Selectable units: g/m³ and ppmw

Accuracy

• After zeroing, max. error is the sum of: 0.4% of measurement + 0.1% of scale
• Repeatability error: 0.2% of measurement

Response Time

• Analog output: 0.03 s
• Remote display: 0.3 s

Drift

• Zero drift: typically 0.2% of range per day (after warm-up, non-cumulative)

Pressure Limits

• BMT 964 AQ:
  • 10 g/m³: 1.0 barg
  • 50 g/m³: 4.0 barg
  • 100 g/m³: 4.0 barg
  • 150 g/m³: 6.0 barg
• BMT 964 AQ/HF:
  • 10 g/m³: 2.5 barg
  • 20 g/m³: 2.5 barg
  • 50 g/m³: 2.5 barg
  • 100 g/m³: 4.0 barg
  • 150 g/m³: 4.0 barg

Environmental

• Ambient temperature: 0 - 50°C (non-condensing)

Materials in Contact with Ozone

• BMT 964 AQ: SS, quartz, PTFE, PFA, FFPM, PVDF
• BMT 964 AQ/HF: Sapphire, PTFE, PFA, FFPM, PVDF

Hydraulic

• Fluid ports: 1/4'' Flaretek
• Recommended flow rate: 0.1 to 0.3 l/min
• Pressure drop: approx. 33 mbar at 0.3 l/min

Signal Outputs

• Concentration: 4 - 20 mA (isolated, active)
• Concentration: 0 - 10 V (isolated)

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
• Purge Control

Error Handling

• Error Relay (30 V, 1 A): Summarizing instrument failures
• Specific Errors: Lamp Low Error, Lamp Off Error, Cuvette Dirty Warning, Cuvette Dirty Error, Overrange, Overpressure

Early Warnings

• Lamp Low Warning
• Cuvette Dirty Warning

Serial Interface

• RS-232, bidirectional, isolated
• Baud rates: 2400 - 38400 Baud

Automatic Zeroing

• Possible via control input

Software

• BMT 964 Link for instrument configuration and readout of Event and Error Logs on a Windows PC

Power Supply

• Wide range input: 100 - 240 VAC, 15 VA
• Optional: 12 - 36 VDC, 15 W

Mechanical

• Dimensions (W x H x D): 260 x 160 x 91 mm
• Weight: 3 kg
• Enclosure: Splash-proof aluminum (IP 65, NEMA 4X) with sea water resistant coating (RAL 5009, azure)

Other BMT Products

• BMT 964 AQ-LC: Low concentration measurement in ultra-pure DI water
• BMT 964: Ozone measurement in gas phase
• BMT 932: Ozone Monitor for TLV monitoring in ambient air (1, 3 & 6 channels)
• BMT 802N & BMT 803N: Ozone Generators (4 g/h & 8 g/h)

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Disclaimer: This extraction may miss figures, footnotes, or revisions. Contractual data must match the OEM PDF revision used on the project.

Official datasheet (PDF)

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