Vpl chemicals is an iso 9001:2000 certified company that manufactures indicators with tempindic trade name. These temperature indicators from vpl chemicals are popularly known as thermal melt crayons or sticks or chalks. Vpl`s tempindic temperature indicators are available with salient features like melt within ±1% of the rated temperature changing from chalky mark to liquid smear; melting [smear] of tempindic mark indicates the surface temperature of the object. The low cost temperature indicators are extensively used to measure surface temperature of the objects during pre-weld, post-weld operation, heat treatment, foundries, forgings and annealing, etc. The company has developed these temperature indicators in 90 different temperature ratings systematically spaced between 50ºc to 1200º c [another 90 ranges in ºf] keeping in mind wide applications and requirements of users. These tempindic temperature-indicating crayons are made of high quality raw materials and free from lead and sulfur and can be supplied with an aluminium holder.
