Yamato BH-Series Water Bath

Benchtop precision constant temperature bath equipped with high performance controller for higher precision and wider temperature range

Performance and functions

  • Precision controller enables temperature adjustment accuracy of ±0.01°C (at 20°C)
  • BH501 can be used as precision water or oil bath
  • Maximum of 99 steps of programming operation, fixed temperature operation, quick auto stop, auto stop and auto start functions
  • RS485 communication function, temperature output terminal (1~5V), alarm output terminal, calibration offset function and key lock function
  • Better external circulation with powerful circulation pump
  • Circulation pump flow changeable up to 10 patterns
  • Circulated water temperature (closed type) can be controlled precisely by external sensor
  • Control panel can be removed for remote control by using communication cable (sold separately)

Safety features

  • Self diagnostic functions, Earth leakage circuit breaker, Empty boiling prevention switch, Automatic overheating prevention, Independent overheating prevention


Model BH401 BH501
Circulation system Water jet pump circulation (closed system circulation)
Operating temperature range *¹ RT+15~100°C RT+15~200°C
Temperature adjustment accuracy ±0.01°C (water: RT+15°C~80°C), ± 0.1 (silicon oil: KF96/50cst 70°C~200°C)
Temperature indication unit 0.1°C
Circulation Pump (50/60Hz) Water jet pump circulation
Pump max. flow 14/15L/min. (Circulation pressure loss when below 10kPa)
Pump max. lift 2.8/3.4m (water flow about 0.5L/min)
Heater 1kW 1.2kW
Ambient temperature range 5~30°C
Temperature control / system PID control by microprocessor
Temperature setting / display method Digital setting / display
W sensor: Pt 100O A-class (for temperature control)+ K-thermocouple
(for overheat prevention) double sensor
Timer 1min.~99hrs.59min., 100~9999hrs Timer / Time switchable function
Operation function
Fixed temp. operation, Quick auto stop, Auto stop / start at setting time,
Program operation (max. 99 steps, repeating, gradient operation),
Program auto start operation
Safety device
Earth leakage circuit breaker, Key lock function, Breakout protection function,
Automatic overheating prevention, Independent overheating prevention, Float switch
Other functions
RS485 communication function, Temperature output terminal, Alarm output terminal,
Calibration offset function
Dimensions W239 x D299 x H200mm
Internal capacity 13L (liquid 10L)
Effective water bath dimension W227 x D150 x H200mm (front corner R34)
External dimensions *² W310 x D396 x H607mm (water bath height)
Power source
AC115V 10A
AC220V 5A
AC115V 11.5A
AC220V 6A
Weight ~20kg
Accessories Hose nipple (1/2 x ø14mm) 2pcs.
Item Capacity Temp. Range Unit of Measure Price Purchase
13L (liquid 10L) Ambient +15°C to 100°C Each
Contact customer service for ETA In Stock
13L (liquid 10L) Ambient +15°C to 200°C Each
Contact customer service for ETA In Stock

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