According to Hanna Instruments , molybdenum or molybdate are salts often used in industrial cooling towers.
They are non-toxic and continue to become more popular over chromates as a corrosion inhibitor. Molybdenum has a wide variety of applications as an alloying agent in steel and cast iron, a pigment for inks and paints and also as a multipurpose solid lubricant. The housing of these meters has been perfectly designed to fit the palm of your hand. Each meter weighs less than 300 grams. The meters long battery life makes it ideal for on-the-spot checks. This microprocessor based meter gives you the highest level of reliability, offering push button measurement at a competitive price.
HI 93730 is supplied complete with 2 cuvets, battery and instructions.