Davis Instruments, Vernon Hills, IL, offers the Hart Scientific Models 1523 and 1524 handheld reference thermometers. The thermometers let you measure, graph, and record using RTDs (PRTs), thermocouples, and thermistors with accuracies of up to 0.004%, 0.005%, and 0.01% respectively, A backlit LCD displays data trends. Rugged handheld design ensures durability. The Model 1523 is a single-channel reference thermometer while the Model 1524, for simultaneous dual-channel use, can log up to 15,000 time- and date-stamped data points.
Reference Thermometers from Davis Instruments