Ultraflow 150 – Gas Flow and Temperature Monitor
Product Announcement from Teledyne Monitor Labs, Inc.
State-of-the-art signal processing and innovative modularity offers customers incomparable performance, accuracy, flexibility and a maintenance-free solution amongst all flow technologies.
The Ultraflow Model 150 is a non-contacting gas flow and temperature monitor. The system measures the transit time of a tone burst through the gas stream to determine both flow and temperature. Transducer assemblies are usually mounted opposite each other at a 45° angle to the flow on each side of the stack or duct with one transducer upstream from the other. In unusual locations or where a second platform is cost prohibitive, a dual set of transducer assemblies (four) can be installed at a much-reduced angle of offset. This "X Pattern provides an average flow measurement directly up the stack and has the added benefit of multiple certifications of both transducers assembly sets. This ensures nearly 100% uptime.
· Ultra-low drift operation
· Full system integrity calibration checks
· Low mounting angle rejects pitch flow effects
· Non-intrusive, non-contacting technique
· Flow measurement independent of flue gas composition, pressure and temperature
· Measurement technique rejects cyclonic flow
The system accurately measures the time required for the tone bursts to traverse the gas stream in each direction. The flow velocity is directly related to the difference in propagation time, t1 and t2 of the tone bursts with and against the gas flow. Based on the cross-sectional area of the stack or duct, the flow velocity is converted to volumetric flow. This flow measurement is independent of the temperature, density, viscosity and particulate or condensate concentration.
Older differential pressure or thermal methods place one or more sensing elements inside the stack in direct contact with the flue gas. These devices are then subject to erosion, corrosion, plugging or fouling. Verification of the total system integrity and performance under these conditions must include visual inspection of the sensing element of Method 2 testing.
Completing ultrasonic technologies lack the integral design of the Ultraflow and therefore have not performed in many applications as expected. Low signal power and non-purged systems have verified that certain designs lack the accurate and reliable results of the Ultraflow.
With the Ultraflow's new quad-probe handling capability, improved resolution and faster response time, the monitor is ideally suited for both small and large stacks and less than ideal locations. The quad probe design rejects all pitch angle flow while signal processing improvements enable quicker response time and better accuracy.
The Teledyne Monitor Labs Ultraflow 150 makes a drift-free measurement across the center of the stack and calculates an average reading without contacting the gas stream. In addition, the sensing elements are protected from corrosive stack gases by the use of purge air.