Detection instruments[india]pvt ltd. Manufacture the most reliable fixed systems. Nimbus, which is a compact and lightweight yet rugged and reliable infra-red gas detector is dust and water ingress protected to ip67.Compatible with windows ce and mtl 611b software, nimbus can be calibrated by one man in hazardous areas without a `hot work permit` & without opening the detector. Below is a list of a few characteristics of nimbus: