Model 5028 Slim Humidity Probe can measure humidity more easily in ductwork and other heating-cooling equipment, the company states. It has a shaft diameter of 0.25 inches and is 5 inches long. It features a temperature range of 0 degrees to 150 degrees F (-18 degrees to 66 degrees C), humidity range of 10 percent to 95 percent relative humidity, and comes standard with a 6-foot polyurethane coil cord. This probe can be used with all of the manufacturer's thermistor instruments.

Cooper-Atkins Corp., 33 Reeds Gap Rd., Middlefield, CT 06455-0450; 860-347-2256 or 800-835-5011;

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