Sperian was formerly known as Biosystems and is now owned by Honeywell Analytics. Honeywell has decided to discontinue this product line; the last date they will accept orders for the legacy Sperian Biosystems gas detectors is June 15, 2019. Orders will be accepted based on material availability. Honeywell will continue to provide service for the detectors and support the accessories and replacement sensors for 2 years following the EOL date, also subject to material availability.