The Sanitron S37B UV Unit by Atlantic Ultraviolet is a discontinued model that was part of Atlantic’s expansive Sanitron line that covers everything from residential to commercial to industrial uses. The S37B is 37” long to provide approximately 12 gallons per minute and uses 1 lamp and sleeve. The Sanitron series features an Easy-Off end cap, a removeable flanged head for easy disassembly in case of repairs with no special tools, a drain plug, a manual wiper and wiper lock to provide easy cleaning of the quartz sleeve with no disassembly required, and a sight port to allow easy visual confirmation of UV lamp operation. The Sanitron has several options such as a lamp status alarms, a safety sensor, an ultraviolet monitor, elapsed time indicator, solenoid valve, flow control, and more. The S37B is a cheaper non-NSF certified model.