THIS DEW POINT/RH/TEMPERATURE PEN is made of sturdy metal. The 1.7 oz. pen enables quick readings of RH and temperature, in C or F, and will also display a continually updated delta from starting point. It also recalls high and low readings. The pen stands upright on its base enabling unobstructed airflow around its sensor. A pocket clip provides easy portability, and a protective foam-lined case offers storage protection.    
Sper Scientific
CIRCLE 131 on card