FM Approvals has been made aware by Yokogawa Process Analyzers (YPA) Europe BV that they had identified a manufacturing defect resulting in a deviation from the Approved product design for the intrinsically safe ISC40S Inductive Conductivity Sensor that is FM Approved for the USA and Canada for use in Hazardous Locations (potentially explosive atmospheres).

Company Identity: Yokogawa Process Analyzers Europe BV

Address: Euroweg 2
Amersfoort, 3825 HD
Netherlands

Contact Information: YPA.marketing@yokogawa.com

Description: Inductive Conductive Sensor

Make/Model: ISC40S

FM Approval Status: FM Approved for Canada & USA for use in Hazardous Locations.
Canada: FM22CA0012X & United States: FM21US0083X

Number of Units Impacted: 664 units manufactured between 1st November 2022 and 24th April 2024.

Hazard Involved: The product in question contains a Pt1000 temperature element that is intended to be encapsulated to protect against the risk of ignition of a surrounding explosive atmosphere due to thermal effects. It was identified that this component was not encapsulated as intended during production, leading to the potential for a hot-spot in the event that the sensor host such as the FLXA202/21 and EXA202 enter a fault condition. Under these conditions there is the potential for an explosive atmosphere to come into contact with the element, causing an explosion.