Sense-Ware T-229/4P UV/IR Flame Detector Universal Test Lamp activates UV, IR, and UV/IR Flame Detectors which detect in the 185-235 nm UV and 4.4 µ IR frequency ranges. For UV only detectors the maximum distance is up to 8 meters (26 ft) in the continuous mode. The test range for IR and UV/IR detectors is up to 4 meters (13 ft). Most IR Flame Detectors have an extra alarm criterion; analyzing the flicker frequency of fire. The Test Lamp T-229/4P can be put into the pulse mode by means of a selection switch on the left side of the Test Lamp. The lamp then emits pulsed energy with a frequency of approx. 2 Hz. After the alarm delay time, the IR or UV/IR Flame Detector will activate. Not suitable for: IR/IR- (dual IR), IR/IR/IR (IR3 or triple IR) Flame Detectors, whether or not in combination with a UV sensor. For use in safe areas only.