Multi-Function Process Calibration for
Demanding Environments
ATEX-Certified Calibration Tools
When you’re working in challenging field environments, you need calibration tools that are accurate, portable, and built to last. Additel’s multi-function process calibrators are designed to make your job easier by combining a wide range of measurement and calibration capabilities into one robust, cost-effective device.
The Additel 226 and Additel 227 are engineered to source, simulate, and measure pressure, temperature, and electrical signals – giving you a complete solution for calibrating and verifying analytical instruments in the field.
With an intuitive touchscreen interface and built-in application features such as high static differential pressure measurement, pressure leak testing, safety valve tests, and signal conversion, these devices help you work more efficiently. Pair them with the Additel 161 or 161 Ex intelligent digital pressure modules for pressure measurements up to 4200 bar – all while staying mobile and productive.
Whether you choose the Additel 226, with 0.015% RDG + 0.005% FS electrical accuracy, or the Additel 227, which adds enhanced accuracy (0.005% RDG + 0.005% FS), HART communication, automated task management, and datalogging, you’ll benefit from powerful tools that support your daily calibration tasks with speed and precision.
A Modern ATEX-Compliant Solution for Zone 0 Applications
If you’re working in hazardous environments, the Additel 226Ex and Additel 227Ex offer a trusted solution. Certified to the highest safety standards (ATEX, IECEX – Ex ia IIC T4 Ga), they’re ready for use in Zone 0 locations across the oil & gas, chemical, pharmaceutical, and energy industries.

Looking to Replace the Fluke 725 EX?
The Additel 226Ex and Additel 227Ex deliver a modern, ATEX-approved alternative with advanced features tailored for your calibration needs in explosive atmospheres.
Available now from Chamois Metrology – a UKAS-accredited pressure and temperature calibration lab, offering full servicing, repair, and support. As the UK distributor for Additel and Accumac, we’re here to help you find the right tools for your application.

Get In Touch
Speak to one of our team to discover Chamois’ extensive experience in UKAS accredited pressure, electrical, mass, and temperature calibration (Lab no. 0822), as well as the supply of associated instrumentation.