Quick view Honeywell Analytics Honeywell SPM Flex Unit & Chemcassette Tapes Compare $14,212.00 Honeywell SPM Flex The SPM Flex, the next evolution of our SPM and TLD gas Detectors with Chemcassette® tape technology, is capable of working as both a fixed and a portable unit. The monitor detects the ultrasensitive gases inherent in your... Choose Options Choose Options