*Very useful tool to prevent heat stroke
*The black ball thermometer is for measuring radiant temperature with a 75mm dia. black ball
(Hollow sphere in brass)
*Protect sensors with a clear sheath moving up and down
*Easy to self calibrate relative humidity with 33% / 75% salt solution by moving the black ball and clear tube
*Programmable printing Bench Top pH / mV meter with Temp. & real time clock stamped
*Easy & convenient to operate printing condition by pressing buttons on the unit
