Sentinel DRT-1 Digital Recycling Timer Accurate timers are important for a variety of processes. Hydroponics gardening is no exception. Sentinel has developed TWO timers that are specifically designed to control the critical timing functions of a normal hydroponics garden. No complicated ... More Details
Price: $93.17

Sentinel EVC-2 Environmental Controller We have combined digital temperature humidity controls together in one flexible unit called the EVC-2 Environmental Controller. It has two additional features which activate a Night Device and a CO2 device. The EVC-2 provides the perfect combination of f... More Details
Price: $223.60

Sentinel EVC-1 Environmental Controller Temperature Humidity CO2 . What do they have in common? They are all environmental conditions inside a growing area that need to be controlled for successful gardening. The EVC-1 Environmental Controller controls all that and more. If you want a sim... More Details
Price: $149.07

Sentinel CO2 Regulator Reduces the pressure of the C02 exiting the tank, controls the flow of C02 with a solenoid valve and regulates the amount of C02 being released with a precision 1/2 to 15 SCFM flow-gauge. The C02-REG C02 regulator assembly comes complete with all of the r... More Details
Price: $111.80

Sentinel Expansion Regulator Works with the CO2-Reg. When used together, more than 1 tank can be coupled together to extend the time between tank changes. The C02-EXP C02 expansion regulator assembly comes ready to install. 120v. ... More Details
Price: $59.63