The California Air Resources Board (CARB) has given interim verification to Nett Technologies Inc's proprietary advanced BlueCAT closed-loop catalyst system for certain forklift and other off-road engines.

Canada-based Nett's system uses a three-way catalytic converter and a dynamic digital air-fuel ratio controller. It was approved to control emissions from large-spark-ignited model year 1990-2001 engines of 25 horsepower or more used in unregulated off-road applications and operating on LPG fuel.

CARB posted the move in the interim verification link on its website.

On December 9, CARB posted an interim verification for the TermiNOx brand closed-loop emission control system for four-cylinder LPG forklift and truck engines from Engine Control Systems, of Newmarket, Canada.

Interim verifications are in force until CARB passes a verification procedure, which converts interim verifications into executive orders.