Bay Area Test Equipment Inc is one of the leading constant temperature &humidity test chamber manufacturers and suppliers, welcome to buy and wholesale cheap and best programmable constant temperature test chamber from us. BTH Series Constant Temperature & Humidity Chamber Excess moisture is very damaging to a multitude of products. Constant Temperature & Humidity Testing allows a manufacturer or Test Lab to see how their product will perform in these conditions. Temperature & Humidity Chambers offer the ability to achieve 20% to 98% Relative Humidity with temperature to test their product. BACL also offer options that can help you achieve 10% Relative Humidity if needed.