Help, I need to buy a torque wrench

I worked in a Metrology lab for a short time. I'd advise an old beam style. If the pointer is on zero it is good to go. I can't tell you how many clicker torque wrenches we threw away because they were out of spec. Of course they were used all day every day. Another word of advise is to get more than one with different ranges, up to 150 ftlb, 120 inlb, etc. If doing smaller fasteners, use the inch pound torque wrench.