https://gaotek.com/product/gaotek-handheld-temperature/

SKU: GAOTek-HTPC-119
This Handheld Temperature Gun Thermometer has a current range of 0 A to 100 A, a power supply of 200 hrs, and an AC voltage range of 0 V to 600 V.

Process Calibrator with 24V Capacity and Digital LCD – GAOTek

SKU: GAOTek-TPC-121
Accurate process and thermocouple calibrator with voltage, current measurement, digital display, and portable design for on-site calibration.

GAOTek Temperature Calibrator with DC Voltage (Resistance, RTD)

SKU: GT00VU00ZW
This Temperature Calibrator with DC Voltage (Resistance, RTD) adopts high-performance ARM microprocessor, can output DC voltage, resistance, thermocouple and RTD along with quick response and stable data.