Top view of 4” cap-assembly with two 1.5” TC fittings welded at a 10 degree angle and two .75” TC fittings for diptube and filltube.

Slotted Sightglass
Slotted Sightglass for easy attach/detach capability of the cordless tank illuminating device. Slotted sightglass allows for one light to be used conveniently with many sightglasses mounted in different locations. 4” slotted sightglass allows for viewing with light attached.

Cordless Tank Illuminating Device
Cordless Tank Illuminating Device offers high performance in a powerful, miniaturized, detachable sightglass light. In sharp contrast to other cumbersome and large tank lights requiring extension cords, wiring and electrical outlets, the tank illuminating device is conveniently detachable and portable. A powerful 60 lumens is produced using a single 6v readily available lithium battery with a specially designed XENON lamp. Body is T316L stainless making it corrosion and moisture resistant.