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Constant Temperature Water Bath

  • An extremely high degree of temperature adjustment precision is achieved by using a high-precision thermostat and circulation pump.
  • Settings for the temperature and timer can be easily input using the up and down keys, and the settings appear on a digital display.
The BA/BK models are deep constant temperature water baths.

The BK model enables fixed operation, while the BA model allows for programmed operation. For each model, there are five kinds of tank capacities: 27L, 42L, 70L, 109L, and 144L. .

Fixed Programmed
Temperature Range
Room Temp.+5deg.C to + 80deg.C
Internal Capacity(L)
PDF Catalog

  BK/BA300 BK/BA400 BK/BA500 BK/BA610 BK/BA710
Stirring method Stirring by pump
Operating temp. range Room temp. +5deg.C to + 80deg.C
Temperature control accuracy ±0.02deg.C to 0.07deg.C
Temperature distribution accuracy ±0.3deg.C
Temperature rising time Approx. 120 min. Approx. 110 min. Approx. 165 min. Approx. 160 min. Approx. 200 mins for BK710 and 160 mins for BA710
Interior Stainless steel and glass
Temp. Controller PID control by microprocessor
Temp. Sensor Pt resistance thermometer (double sensor)
Temp setting method Digital setting
Temp display method Digital display
Overheat protector ON/OFF control by microprocessor
Overheat protect setting method Digital setting
Overheat protect sensor K-thermocouple (double sensor)
Heater (SUS316) 1.3kW 2.2kW 2.4kW 3.5kW 4.5kW

Stirring System

Magnet pump
Stirring System
(Magnet pump)
6W 30W 30W 60W 60W


1 min. to 99 Hrs. 59 min. to 999.5 Hrs.
Digital setting, Automatic start/stop
Program Operation 2 pattern 15 steps or 1 pattern 30 steps(only BA type)
Safe Device
Safety countermeasures Self-diagnosis function(Heater defective, Triac short circuit and Overheat protector), Over current, Electric leakage breaker.
Internal dimensions(W×D×Hmm) 300×300×300 400×350×300 500×400×350 548×500×400 640×500×450
External dimensions(W×D×Hmm) 490×360×367 590×410×367 690×460×417 738×560×467 830×560×517
Window dimensions(W×Hmm) 240×215 340×215 440×265 340×215 440×265
Tank Capacity 27 liter 42 liter 70 liter 109 liter 144 liter
Shelf pitch 30mm
Number of plates 5 5 6 9 10
Drain hose φ15×20mm
Power source 50/60Hz AC100V 14A (15A) AC100V 23A (30A) AC100V 25A (30A) AC200V, single phase 19A (20A) AC200V, single phase 25A (30A)
Weight Approx. 19kg Approx. 25kg Approx. 30kg Approx. 36kg Approx. 46kg
  Shelf plate…1pc., Clamp…2pcs., Stand…1pc., Clamp holder…2pcs.

Control panel
BK Control Panel
for BK type
BK Control Panel
for BA type

Optional items
Description Model No. Product Code
Rack for BK-BA300, 294 X 272 X 148.5mm BK-BA Series 221195
Rack for BK-BA400, 394 X 322 X 148.5mm BK-BA Series 221196
Rack for BK-BA500, 494 X 372 X 148.5mm BK-BA Series 221197
Bracket for Viscosimeters, for BK-BA300, for 4 pcs. BK-BA Series 221189
Bracket for Viscosimeters, for BK-BA400, for 4 pcs. BK-BA Series 221183
Bracket for Viscosimeters, for BK-BA500, for 5 pcs BK-BA Series 221184
Water supply pump, for PT-16
(Temp. up to 80 deg. C, lift approx. 2m, water supply approx. 9L/min)
BK-BA Series 221190
Cooling Coil for BK-BA 300, 400, 500 BK-BA Series 221182
Top Cover, for BK-BA300 BK-BA Series 221192
Top Cover, for BK-BA400  BK-BA Series 221193
Top Cover, for BK-BA500 BK-BA Series 221194
Top Cover, for BK-BA610 BK-BA Series 221383
Top Cover, for BK-BA710 BK-BA Series 221384
Truck with caster BK-BA Series 221385
Truck with caster BK-BA Series 221386
Cooling Coil
Bracket for Viscosimeters
Top of water tank for BK/BA300,400,500
Top of water tank for BK/BA610,710
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