| Eastern Calibration Services Co., Ltd. — Chon Buri ชลบุรี | Clamp Meter | 0 - 600 | ±1.5% | A |
| Eastern Calibration Services Co., Ltd. — Chon Buri ชลบุรี | Digital Multimeter | 0 - 1000 | ±0.05% | V |
| Thai Instrument Calibration Co., Ltd. — Bangkok กรุงเทพมหานคร | Clamp Meter | 0 - 600 | ±1.5% | A |
| Thai Instrument Calibration Co., Ltd. — Bangkok กรุงเทพมหานคร | DC/AC Voltage (Multimeter, DMM) | 0 - 1000 | ±0.05% | V |
| Thai Instrument Calibration Co., Ltd. — Bangkok กรุงเทพมหานคร | Insulation Resistance Tester | 0 - 10 | ±5% | GΩ |
| Thai Precision Metrology Center — Pathum Thani ปทุมธานี | DC/AC Current | 0 - 10 | ±0.02% | A |
| Thai Precision Metrology Center — Pathum Thani ปทุมธานี | DC/AC Voltage | 0 - 1000 | ±0.01% | V |
| Nakhon Ratchasima Metrology Center Nakhon Ratchasima | AC Voltage | 0 - 750 | ±0.02% | V |
| Phuket Marine Calibration Center Phuket | DC Voltage | 0 - 1000 | ±0.02% | V |
| Eastern Seaboard Calibration Center Chonburi Chonburi | Process Signal 4-20mA | 0 - 24 | ±0.01% | mA |
| National Institute of Metrology Thailand (NIMT) Pathum Thani | DC Current | 0 - 10 | ±0.001% | A |
| National Institute of Metrology Thailand (NIMT) Pathum Thani | DC Voltage | 0 - 1000 | ±0.0001% | V |
| Central Calibration Laboratory Bangkok Bangkok | AC Voltage | 0 - 750 | ±0.01% | V |
| Central Calibration Laboratory Bangkok Bangkok | Resistance | 0 - 100 | ±0.005% | MΩ |
| Nonthaburi Precision Laboratory Nonthaburi | DC Voltage | 0 - 1000 | ±0.005% | V |
| Nonthaburi Precision Laboratory Nonthaburi | Frequency | 1 - 50000000 | ±0.001% | Hz |
| Samut Prakan Industrial Calibration Lab Samut Prakan | DC Voltage | 0 - 1000 | ±0.01% | V |