... the CO-sensing unit; Specification: * Power supply: DC9V* The sensitivity and time: 50ppm, alarm in 60-90 minutes 100ppm, alarm in ... /OEM orders. * Answer your enquiries, questions and emails in 24 hours * Direct control on material, testing, quality, lead time ect. * Flexible Payment ... year warranty life for all detectors sold out from Lydian high quality Carbon Monoxide detector with LCD displayer