THE IREF PRO CROSS REFERENCE FACTOR MANUAL

Over the years, NET has determined cross factors allowing specific IREF PRO sensors – notably, R-125, R-134a, R-32, R-507, R-1234yf and R-1234ze sensors – to be used when detecting multiple other refrigerant gases, including some gases for which a dedicated sensor is not available yet from NET.

This feature is extremely useful for user who wants to rationalize their P/Ns and limit their stock, as well as to increase the number of detectable gases.

A complete manual providing all necessary data and information is available for download in the IREF PRO product page.

The manual is applicable only to specific IREF PRO refrigerant gas sensors with a 2.000 ppm full scale.

Six common refrigerant platforms from NET (as mentioned, R125, R134a, R32, R507, R1234yf and R1234ze) have been tested against 22 different refrigerant gases to determine the respective cross interference data.

Tests have been performed at different temperatures in order to cover the complete functional temperature range ( -20° C to 50 °C) of IREF PRO sensors and we calculated a factor for each temperature range. When the factors calculated for a specific gas at different temperatures are all very similar, it’s possible using a single cross factor across the full temperature range. When, on the other hand, the factors are significantly different among each other, we recommend using a temperature-proportional cross factor instead. The manual provides Cross Factor Fitting formulas in such cases. Additionally, we also collected data at 60°C to show the variation of the correction factors when the sensor is working above its higher temperature range.

Examples of extended calculations of the cross factor are reported to describe and document the calculation method used.

Due to the different composition and different spectra of many refrigerant gases, in some cases cross factors are not available and specific sensor needs to be used instead.

The IREF Pro Cross Factor manual is intended to be a general guide for users wanting to increase the flexibility of its gas detectors, but we always recommend to users performing specific and thorough tests in order to define the best correction factor for their applications, related to temperature ranges and gas concentration levels.

The manual is periodically updated as new test data become available. Make sure to always download the latest version on our website.