Thermal energy meters. Pattern approval tests|Probes, Heat pipes, Interruption tests, Pressure testing, Electrical testing, Endurance testing, Electrostatics, Electromagnetic radiation, Electrical wave measurement, Flow rates, Test equipment, Meters, Electromagnetic fields, Quality assurance systems, Calculators, Hydraulic pressure, Transient voltages, Electric power systems, Heat measurement, Ratings, Magnetic fields, Environmental testing, Heat exchangers, Heat-measuring instruments, Crime prevention devices, Approval testing, Testing conditions, Thermal-cycling tests, Environment (working), Accuracy