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Home Page of... A Modern Herbal A hyper-text version of A Modern Herbal, 1931, by Mrs. M. Grieve. Over 800 varieties of medicinal, culinary, and cosmetic herbs, including economic properties, cultivation and folk-lore.

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Sentinel Controllers Sentinel Environmental Controllers, Temperature Controllers, and CO2 Controllers for indoor gardening. Download the Sentinel Controller selector chart Sentinel Home Page UTC-1/Universal Temperature Controller 15 amps @ 120 VAC 32 to 120 degrees F 0-99% rH +/- 2'F UTC-1 +/- 15'F Simple to use, 100% digital temperature control. Photocell allows separate day and night temperature settings. Record & recall minimum and maximum temperature levels. Features a heating or cooling mode with adjustable deadband and 16 ft remote probe. Watch Video Download Instructions List price $144.95 - 15% Off - Discount price $123.00 Qty:      EVC-1/Environmental Controller 15 amps @ 120 VAC 32 to 120 degrees F 0-99% rH +/- 2'F +/- 7% rH The EVC-1 provides extreme flexibility in a reliable solid-state environmental controller. Selectable C02, temperature and humidity modes allow the user to control temperature & humidity separately or together. Built-in photocell activates C02 device during the day. Night device outlet can conrol an exhause fan/sulfur burner, etc. Watch Video Download Instructions List price $199.95 - 15% Off - Discount price $170.00 Qty:      EVC-2 Environmental Controller 15 amps @ 120 VAC 32 to 120 degrees F 0-99% rH +/- 1'F +/- 3% rH The EVC-2 controls your temperature & humidity with digital accuracy. Photocell allows day/night temperature & humidity settings and also provides daytime C02 operation. The remote combination temperature & humidity probe allows the probe to be placed near plant canopy. It records & recalls minimum and maximum temperature & humidity levels. The EVC-2 has two temperature modes, heating & cooling with separate humidity control to add or remove humidity. Adjustable temperature deadband. Watch Video Download Instructions List price $299.95 - 15% Off - Discount price $255.00 Qty:      CHHC-4 – All-in-One Total Controller The CHHC-4 controls all of your growing area conditions accurately and reliably. First of all, it has all of the C02 control features of the CHHC-1 and CPPM-1. It also has the ability to control 3 other devices, a heating device and a humidity device. Records the min and max temperature, humidity and C02 levels. Unlike some C02 controllers, the CHHC-4 is able to be calibrated by the user with the self calibration feature. *NEW* Green LED lights make this unit very plant friendly *NEW* Removable combination remote temp, humidity, light level & CO2 probe allows the CHHC-4 to be placed up to 16 feet away. *NEW* Protective caps to help prevent water from getting into the controller Monitors and controls CO2 with PPM accuracy Also controls 3 other devices, a heating device. a cooling device and a humidity device. Separate day/night temp and humidity settings. Records the min and maxi temp, humidity and CO2 levels. Has 2 separate outputs to control cooling and heating. Can increase or decrease the amount of humidity in the growing area. Remote temp, humidity, CO2 and light level sensor List price $799.95 25% Off - $600.00 Qty:      Sentinel CO2 Controller with remote probe (CPPM-4) The CPPM-4 controls your carbon dioxide levels with part-per-million accuracy. It uses a C02 sensor that is extremely accurate and features a ten-year life expectancy. Our combination C02 & light level sensor is housed in a separate remote sensor enclosure that can be located up to 100 ft from the controller. The CPPM-4 controls your carbon dioxide levels with part-per-million accuracy. It uses a C02 sensor that is extremely accurate and features a ten-year life expectancy. Our combination C02 & light level sensor is housed in a separate remote sensor enclosure that can be located up to 100 ft from the controller. The CPPM-4 can also be connected to other controllers so that the C02 is disabled (useful when operating exhaust fans). It can be operated in fuzzy-logic mode (for compressed C02), or on-off (for C02 generators). Green LED displays – While the prior red displays were not bright enough to cause problems, perception exists that green displays would be more plant friendly…so it shall be. Weather-resistant controller housing – Main controller modules are sealed to prevent moisture and contaminants from entering the units. Removable remote probe assembly – Probe is removable allowing you to place the product in remote locations easier than before. Removable probe also allows you to replace the probe easily if damaged due to user neglect (drop in reservoir, foliar spray, step on it, cut the cord, sulfur damage etc) More powerful CPU’s – Ensures more accurate readings and control – also allows for greater expansion of future software capabilities. Dual beam CO2 Sensor – Highest tech, most accurate sensor available to the hobby hydroponics industry. List price $659.95 20% Off - Discount price $528.00 Qty:      Sentinel Environmental Controllers, Temperature Controllers, and CO2 Controllers for indoor gardening.