URS Humidity meter analog gauge is a cheap way to measure the humidity in the grow environment and can be used in clone boxes as well .
Hydroworld Dual zone temp/Humidity Meter measure 2 different sections at the same time .Perfect for a dual zone tent or were inlet temp/humidity is needed to be measured as well as the grow room itself .This is probably the single most important meter in...
Hydroworld Temp/Humidity meter with min /max this is an entry level meter great for propagation ,tents and small areas ,
Hydroworld Temp /Humidity Meter with Outdoor Temp .Hydroworld own range of temp and humidity meters This unit has min /max with external probe that can be used in water .Fantastic for aquaponics .
URS Temp Meter Analog is a cheap and easy way to measure temperature in a growroom or in a clone box .No batteries to change .
Aqua One Water Temp Digital with probe .This simple style of meter has and external probe to check the temperature of you fish tank has an easy to read digital readout .