Cambridge Sensotec Ltd. - PRODUCT NEWS

Detecting residual oxygen within solder reflow

Do you use a mobile phone, tablet or computer every day? With a world that has more gadgets than people, it is not surprising that electronics has progressively become an essential everyday part of modern life. With such a high demand from both the consumer and industrial markets, the expectation is strong when it comes to reliability and quality.

Inside many gadgets you will find a PCB (printed circuit board.) PCB manufacturers worldwide strive continuously to improve quality control in order to minimise product failure. For many PCB manufacturers, the reflow soldering process is the most popular manufacturing method, as it allows mass production of PCB's with intricate surface mount component soldering of the highest quality.

The reflow soldering process uses a solder paste to attach multiple electrical components temporarily to their contact on the circuit board; after assembly it is then subjected to controlled heat within the solder reflow oven, melting the solder and permanently connecting the joint between the component and the circuit board. Nitrogen is introduced into the solder reflow oven to enhance the quality of the soldering, as it creates an inert atmosphere reducing the risk of oxidisation as well as improving the wetting angles of the soldered joints. The inert atmosphere within the oven is maintained using a gas analyser capable of measuring ppm (parts per million) of the oxygen content.

Designed to detect any residual oxygen within the oven, the Rapidox 1100 PFC also incorporates closed loop control and is capable of sending a signal to a proportional flow control valve (PFC). Parameters can be configured via the Rapidox software, allowing full control of the nitrogen environment within the oven. These results not only ensure quality assurance of the PCB, but also extend the life of the PFC valve, therefore providing significant savings in expensive nitrogen gas.

For further information on gas analysis used within solder reflow ovens or other manufacturing applications that require gas, please contact us on our live chat found on our website, call +44 (0)1480 462142 or email

Cambridge Sensotec Limited specialises in the design and manufacture of gas analysis equipment under the Rapidox brand name. Based in the UK, the company has an established worldwide distribution network and ISO 9001 accreditation. The Rapidox range includes high precision, scientific gas analysis equipment designed for use in industrial processes, quality control applications, environmental monitoring and research and development experiments. Initially specialising in oxygen analysis, Cambridge Sensotec has since diversified and extended its product range into other gas analysis markets, including SF6 gas monitoring.
Cambridge Sensotec is also a UK distributor for many fixed and portable gas detectors including BW Technologies, Industrial Scientific, Oldham, WITT and Viamed.
About Cambridge Sensotec

Cambridge Sensotec Limited is an ISO9001 accredited Company based in the UK. Cambridge Sensotec Ltd manufacture a comprehensive range of on-line, portable and bench mounted gas analysers including zirconia and electrochemical oxygen sensors, dual-gas analysers such as CO2, CO and H2O. The company also produce a range of multiple gas analyser for SF6, SO2, H2, CH4 and many others. Our precision instruments are designed for industrial process and quality control applications as well as R&D experiments and environmental monitoring.
Cambridge Sensotec are also UK distributors for many fixed and portable gas detectors including BW technologies, Industrial Scientific, Oldham, WITT and Viamed.'

For more information, please contact :-

Cambridge Sensotec Ltd.
Tel: +44(0)1480 462142
Fax:+44(0)1480 466032

August 2017

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