Optical Cell Technology
 
The simple optical cell technology offers reliability and accuracy and extremely long life. Unlike other equally priced equipment, the optical cell technology fitted in the Basic Purge Monitor is non-depleting. An internal pump provides precise and consistent gas sampling readings. The BPM displays Oxygen levels from ambient (20.90%) down to 0.01%.
 
The basic 4 x 20-character monochrome LCD screen displays both the Oxygen data and the remaining battery level.
 
Single push-button operation
The ergonomic case ensures comfortable hand-held use and the single push-button operation makes the BPM incredibly simple to use. Operates for both continuous monitoring of Oxygen levels and for quick, easy spot checks. For use with all inert purging gases and purging applications.
Applications: Inert welding gas purging
Temperature: 0 – 50°C
Battery Type: Li-Ion 7.2v 2.6Ah rechargeable
Battery Charger: External 90-240VAC input, auto-selection 2-hour recharge time
Sensor Type: Non-depleting optical sensor
Oxygen Level: 20.90% to 0.01%
 
Further purging products available
TVC’s purge monitor range includes the Handheld Purge Monitor (HPM), available in two models, and the Gas Purge Monitor (GPM).
 
The HPM-01 uses a simple non-depleting optical oxygen cell. The HPM-02 combines the optical cell technology from the HPM-01 with a miniature, low power Zirconia sensor. Both the HPM-01 and HPM-02 have onboard data-logging.
 
With a 5.7-inch LCD, the GPM also provides an onboard printout of the logged data. Options include an inline hygrometer sensor for measuring moisture content in purge gas and an external warning beacon system.
 
Finally, the Gas Purge Automatic Flow Control System, designed for use with the GPM, offers full automation for gas purging activities. Easily programmed to give three flow rates (high, mid and low). Control of purge gas flow according to the Oxygen level provides quick, accurate and efficient purging. When only the optimum amount of gas is used for the purging process this ultimately results in cost savings!
 
A purge monitor, also known as a welding purge monitor or oxygen analyzer, is a specialized device used in welding applications to ensure proper purging of oxygen from the weld zone. Welding in an oxygen-free environment is crucial for certain materials, such as stainless steel, titanium, and other reactive metals, to prevent oxidation and maintain the integrity of the weld.
 
Here are some key points about a purge monitor used for welding:
Purpose: The primary purpose of a purge monitor is to measure and monitor the oxygen concentration inside the welding chamber or the area surrounding the weld joint. It provides real-time feedback on the level of oxygen present, allowing welders to take corrective actions if necessary.
Oxygen Monitoring: The purge monitor typically employs an oxygen sensor, often based on zirconium oxide technology, to measure the concentration of oxygen. The sensor responds to changes in oxygen levels and provides accurate readings, usually displayed in percentage or parts per million (ppm).
Welding Purging Process: Purging involves replacing the ambient air in the weld zone with an inert gas, such as argon or helium, to create a low-oxygen environment. The purge monitor assists in achieving and maintaining the desired oxygen level by indicating whether further purging is required or if the environment is adequately oxygen-free for welding.
Alarm System: Many purge monitors feature an integrated alarm system that alerts the operator when the oxygen concentration exceeds the pre-set threshold. This helps prevent welding in an unsuitable environment and ensures the weld quality is not compromised.
User Interface: Purge monitors typically have a user-friendly interface with a digital display that shows the oxygen concentration in real time. Some models may also provide additional information, such as temperature and gas flow rate, for comprehensive monitoring and control.
Portable and Stationary Models: Purge monitors come in various designs, including portable handheld units and stationary models. Portable monitors are useful for on-site or field welding applications, while stationary ones are often employed in workshops or dedicated welding setups.
Weld Quality Assurance: By using a purge monitor, welders can have greater confidence in the weld quality and avoid issues like porosity, oxidation, and reduced corrosion resistance. It ensures that the weld joint meets the required standards and specifications.
Compliance with Standards: In certain industries and applications, such as aerospace, automotive, and food processing, strict quality standards and regulations dictate the need for oxygen monitoring during welding. A purge monitor helps meet these requirements and ensures compliance with the specified guidelines.
 
Remember, while the above information provides a general overview, the specific features and functionalities of a purge monitor may vary between manufacturers and models. It is always advisable to refer to the manufacturer's instructions and guidelines when using a particular purge monitor for welding.