Product Details

The OZONE MONITOR BMT 932 is a state-of-the-art UV photometer for measuring and monitoring ozone content of the ambient air. The ozone content is displayed in ppmv or µg/m3 (at 1 atm and 20°C), a dimension requiring temperature and pressure compensation. This is the reason why the OZONE MONITOR BMT 932 is temperature and pressure compensated, of course. The instrument may be ordered with 1, 3 or 6 sample channels. Switching from channel to channel is automatic, or manual via a push button. The BMT 932 is designed to allow direct handling of three independent EMO circuits (Emergency Machine Off) with multi-channel monitors to facilitate the direct control of ozone generators in workplace safety applications. Since the application of the BMT 932 mainly is TLV (Threshold Limit Value) monitoring, continuous and safe operation of the instrument is the predominant requirement. This is the reason why the BMT 932 has two scrubbers (the scrubber is one of the most important elements of an ambient ozone monitor). And it has a built-in ozone generator for intermittent automatic testing the function of the utility scrubber. When this scrubber fails in completely removing the ozone from the sample ozonated by the ozone generator, the instrument automatically switches from the utility scrubber to the reserve scrubber, and at the same time activates a scrubber failure. The ozone concentration is displayed on a two-line 40-character alphanumeric display. The concentration unit can be changed during operation. Additional modifiable parameters are among others:  Alarm parameters (two alarm thresholds for each channel, alarm latching, audible, opening or closing relays, EMO circuit to alarm assignment)  Date and time  RS-232 interface parameters These parameters can be set with the three push buttons on the front panel as well as by connecting the serial interface to a Windows PC running the software BMT 932 Link, which is supplied with each instrument. Another way of configuring the instrument is to use the so-called Link Mode via the serial interface. Active sample channels for automatic sampling can be chosen as desired. It is also possible to choose only one channel for measurement. Switching from automatic to single channel sampling is easily done by just pressing the ENTER button. The sample gas flow rate is maintained constant by a pump which is automatically controlled by a built-in electronic flow meter. In case the pump fails and the flow rate drops, the Low Flow Error is activated indicating a pump failure. The highly stable UV radiation source has a life expectancy of well over 5 years. Via an automatic control loop the radiation output of the UV lamp is precisely maintained constant during its service life. When the lamp's performance drops significantly, the Lamp Low Warning is activated indicating that the lamp should be replaced by a new one during the next few weeks.