OPAL 300 Series
Velocity and Temperature Monitors
OPAL 300 Series velocity and temperature monitors provide continuous and individual measurement of flue
gas velocity, temperature and pressure to enable volumetric flow determination for industrial emissions
license reporting.
Based on the proven techniques of differential pressure measurement using an automatic self purging pitot
tube probe unit, the OPAL 300 systems offer reliable and precise air velocity measurements across a wide
range of stack gas stream velocities and conditions.
Using the measured duct dimensions, the total volumetric flow calculation (m3/hr) is based on the 3
measured components of DP, temperature and duct pressure in accordance with standard engineering formulae.
The measured components are determined in accordance with requirements and guidelines of USEPA Performance
Specifications #2 and #6.
The OPAL 300 has an integrated auto purge capability to ensure reliability for dusty and wet process
conditions, and an autozero capability to ensure zero sensor drift.
Available in variety of probe insertion lengths from 250 to 3000mm.- Outputs for stack temperature, air velocity, volumetric flow and stack pressure.
- Integrates with standard OPAL main control unit.
- Available as second channel output for opacity monitoring system.
- Routine programmable autozero calibration.
- Automatic self cleaning operation.
