The Testifire was the 1st multicriteria detector tester available. It makes testing the two solitary and multi-sensor detectors more simple and even more economical. Testifire 1001 tests sensors by manufacturing heat and smoke, and the Testifire 2001 checks sensors by creating heat, smoke, and carbon monoxide in only one device. https://firealarmtestingequipment78900.thezenweb.com/how-much-you-need-to-expect-you-ll-pay-for-a-good-testifire-fire-alarm-testing-equipment-72267354