| Operating temp. range | Room temp. +5~95°C | Room temp. +5~90°C |
| Temp. adjustment accuracy*² | ±2°C (at 60°C) | ±2°C (at 60°C) | ±1°C (at 60°C) | ±1.5°C (at agitation) |
| Temp. control system | ON/OFF control | ON/OFF control | PlD control by microprocessor | PlD control by microprocessor |
| Temp. setting / display method | Analog setting (Glass thermometer indication) | Analog setting (Glass thermometer indication) | Digital setting by ?? keys | Digital 7 segment LED Digital setting by ?? keys |
| Operation function | Operation at fixed point | Operation at fixed point | Operation at fixed point | Fixed temperature, quick auto stop, auto stop, auto start |
| Additional functions | -- | -- | Temp. preset function (preset / select one temp.) | Keypad lock, maintenance function (RE signal transmission and reception), calibration off-set, power failure recovery |
| Heater | SUS316 pipe heater 500W | SUS316 pipe heater 1kW | SUS316 pipe heater 1kW | 1kW (100V) / 1.44kW (120V) 1kW (200V) / 1.44kW (220V) |
| Sensor | Liquid expansion type | Liquid expansion type | Pt100Ω | K thermocouple |
| Safety device | Bath protection cover | Bath protection cover | Bath protection cover | Bath protection cover (ABS heat-resistant resin) |
| Overcurrent protection (fuse: 7A), thermal fuse | Overcurrent protection (fuse: 15A), thermal fuse | Self-diagnostic functions (automatic overheat preven- tion, sensor trouble, triac short circuit, heater disconnection, main relay failure), circuit protector, thermal fuse | Self-diagnostic functions (automatic overheat prevention, sensor trouble, triac short circuit, heater disconnecton, main relay failure), circuit protector, thermal fuse, micro switch to detect heating without water |
| Water tank capacity | ~4L | ~7L | ~7L | ~4L |
| Water tank dimensions | ø200 x D120 mm | ø250 x D150 mm | ø250 x D150 mm | Max. ø240 x bottom ø165 x D122 mm |
| External dimensions WxDxH | 240 x 300 x 150 mm | 310 x 360 x 230 mm | 310 x 360 x 230 mm | 340 x 349 x 231 mm |
| Weight | ~3.5kg | ~6kg | ~7kg | ~5.5kg |
| Power source (50/60 Hz) | AC115V 4.5A paddle switch AC220V 2.3A paddle switch | AC115V 9A / AC220V 4.5A | AC115V 9A / AC220V 4.5A | AC100V~120V 12.5~10.5A / AC200~240V 6.5~5.5A |
| Accessories | Bar thermometer (10~110°C) with immersion line | -- | -- |