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965-ST Front
Ozone Gas Analyzer BMT 965 ST, Standard Panel Mount
965-ST Right
Ozone Gas Analyzer BMT 965 ST, Standard Panel Mount
965-ST Back
Ozone Gas Analyzer BMT 965 ST, Standard Panel Mount
965-ST Left
Ozone Gas Analyzer BMT 965 ST, Standard Panel Mount
965-ST Top
Ozone Gas Analyzer BMT 965 ST, Standard Panel Mount
965-ST Bottom
Ozone Gas Analyzer BMT 965 ST, Standard Panel Mount
965-ST Front
965-ST Front
965-ST Right
965-ST Right
965-ST Back
965-ST Back
965-ST Left
965-ST Left
965-ST Top
965-ST Top
965-ST Bottom
965-ST Bottom

 The OZONE ANALYZER BMT 965 ST includes decades of experience with ozone photometers and their industrial applications. Superior stability of the photometer is achieved by use of a true dual beam optical system with an extremely long-life mercury lamp. MTBF of the instrument, including the lamp, is in excess of 65,000 hours. Excluding the lamp, it is 120,000 hours.  An eight gigabyte non-volatile log memory is included, providing virtually unlimited storage capacity for concentration and error logs. If connected to a PC, the instrument acts as an external USB drive, from which concentration and error logs can be downloaded. Logs can also be copied and firmware can be upgraded without an external computer just by connecting a USB flash drive. Complete control of all operating parameters is provided with the Windows software BMT 965 Link. Power supply is 100-240 VAC, or 12-36 VDC on request. As an option the instrument can be equipped with an Internal Purge Unit (IPU) (solenoid valve plus air pump) for fully automatic zeroing. A broad spectrum of field-proven accessories - from simple fittings and tubing up to a thermoelectric sample gas dryer - helps the user with the application and installation of the OZONE ANALYZER BMT 965. Please ask for our assistance!

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The OZONE ANALYZER BMT 965 is a panel-mount instrument according to DIN IEC 61554. The front panel cut-out should be 139 x 67 mm. The instrument is held in place by two clamps. Fittings for the inlet and outlet tubing, and the connectors for power, signals, and RS-232 interface, are located on the back panel. The total depth thus is about 250 mm. Additional BMT Products (for details, refer to the appropriate data sheets):
• BMT 965 BT (Bench Top) for stand-alone applications on the bench
• BMT 965 C (Cabinet) for truly automatic stand-alone applications in a rough service environment
• BMT 965 AQ and BMT 965 AQ-INLINE for ozone measurement in DI (de-ionized) water
• BMT DH6 Sample Gas Dehumidifier for drying of wet ozone sample gas
• BMT 932 Ozone Monitor for TLV monitoring in ambient air (1, 3 & 6 channels)

  • Monitoring of ozone generator output
  • Monitoring of residual ozone after a process
  • Potable water treatment
  • Waste water treatment
  • Industrial ozone processes
  • Semiconductor ozone processes
  • Dual beam UV photometer
  • Long-life mercury lamp
  • Warranty 3 years, 5 years on the UV lamp
  • High accuracy, error less than 0.5%
  • Pressure and temperature compensated
  • Ranges from 2 to 600 g/Nm3
  • Built-in sample gas filter
  • Internal Purge Unit (IPU) as an option
  • Relay contact for control of external zeroing valve
  • Error handling includes: summary error, lamp low, cuvette dirty, overrange
  • Key functions programmable via the front panel, or a Windows PC
  • Display in g/Nm3, %wt/wt, or ppmv • High and low limit alarms
  • Timing sequence for automatic zeroing
  • Pressure readout in bar, psi, Torr or MPa
  • 4-20 mA and 0-10 V isolated outputs
  • 8 GB non-volatile log memory (binary and Excel CSV)
  • USB On-The-Go, Firmware upgrades in the field
  • RS-232 interface (bidirectional, isolated)

measurement principle  dual-beam UV photometer (254 nm), no moving parts

MTBF  instrument incl. UV lamp 65,000 h, 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  50, 100, 200, 300, 400, 500, 600 g/Nm3,

optional ranges  selectable units g/Nm3, %wt/wt and ppmv

2, 5, 10, 20 g/Nm3,

accuracy  after zeroing the max. error is the sum: 0.4% of measurement + 0.1% of scale

repeatability error  0.2 % of measurement

response time  0.1 s (analog output), 0.3 s (display) 

zero drift  typ. 0.2% of range per day, after warm-up, non-cumulative 

proof pressure  1 bar above pressure range

ambient temperature  0 - 50 °C (non-condensing)

materials in contact  quartz (cuvette windows), stainless steel (cuvette,

with ozone  f ittings, cuvette spacer), FFPM (window seals), FEP (tubing)

gas port  for PTFE tubing 3x5 mm (1/8“ x 3/16“), opt. 4x6 mm PTFE or 1/8“ Swagelok

recommended flow rate  0.1 to 1 l/min typical

pressure drop  approx. 3 mbar at 0.5 l/min (with sample gas filter)

temperature compens. is standard

pressure compensation  with built-in cuvette pressure transducer, for ozone measurement at an arbitrary systemic pressure, abs. pressure range 1.15 bar (optional 1.5 to 4.0 bar in steps of 0.5, please specify) minimum pressure 0.4 bar abs units selectable: bar, psi, Torr, MPa

signal outputs  concentration 4 - 20 mA (isolated, active) concentration 0 - 10 V (isolated)

concentration alarms  High Alarm, Low Alarm, latching, not latching

control input  set to zero (24 V, 8 mA, isolated)

control outputs  relay contacts, 28 V, 0.5 A, isolated: Lamp Low Warning Cuvette Dirty Warning High Alarm Low Alarm Purge Contro

error handling  Error Relay: 30 V, 0.5 A, summarizing instrument failures, Lamp Low Error, Lamp Off Error, Cuvette Dirty Error, Overrange, Overpressure

early warnings  Lamp Low Warning, Cuvette Dirty Warning

Memory  8 GB for error and concentration logs

USB  On-The-Go, Device/Host mode, Full speed

serial interface  RS-232, bidirectional, isolated, 2400 - 38400 Baud

automatic zeroing  with optional Internal Purge Unit (IPU)

Software  BMT 965 Link, instrument configuration and readout of Concentration, Event and Error Logs on a Windows PC

power  wide range input: 100 - 240 VAC, 15 VA, optional: 12 - 36 VDC, 15 W

dimensions (W x H x D)  144 x 72 x 230 mm, DIN IEC 61554

panel cut-out (W x H)  139 x 67 mm

weight  1.5 kg

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