Enough conveniently located refrigeration facilities or effectively insulated facilities are to be provided and used to maintain potentially hazardous food at required temperatures during storage. Each facility storing potentially hazardous food is to have a numerically scaled indicating thermometer, accurate to plus or minus 2° F (1.1° C), which measures air temperature in the warmest part of the unit.
N.Y. Comp. Codes R. & Regs. Tit. 10 §§ 14-4.51