Viscometer Heating Baths

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  • Temperature range from ambient +5°Cto 150°C.
  • Microprocessor PID control / Automatic tuning / Calibration.
  • Optimal temperature equilibrium achieved by a vane type stirrer with strong circulation power.


  • Easy readout digital LED displays.
    (0.01°Cresolution at 0 to 99.9°C/ 0.1°C resolution at 100 to 150°C)
  • Dual wait on/off timer modes. (1 min. to 99 hr. 59 min.)
  • Convenient memory function of up to three frequently set temperature.
  • Clear visibility provided by double tempered safety glass windows in front and rear sides.
    (for operation from 10°C, use an optional cooling circulator)
  • Ø 51mm holes (for glass capillary viscometer tubes) and a Ø12.6 mm hole. (for a thermometer)
  • RS-232 interface for external control and data collection.
  • Monitor via mobile app anytime, anywhere with LC Connected (mobile monitoring system) connection. (when purchased LC GreenBox)


  • Isolated design of agitator, heater, and sensor by a baffle plate to minimize the turbulence in the bath fluid and also to protect users and samples against direct contact.
  • Complete safety protection system with warning alarms.
    – Low fluid level and dry-running, over-temperature, over-current.
Model VB-25G VB-40G

Bath volume (L / cu ft)

25 / 0.9

40 / 1.4


Working temperature range (℃ / ℉)

Amb. +5 to 150 / Amb. +9 to 302

Temperature stability at 50℃ (±℃ / ℉)

0.1 / 0.18

0.1 / 0.18

Heat up time to 70℃ (min) (±℃ / ℉)




Bath opening / depth (W×L, D) (mm / inch)

145×265, 330 / 5.7×10.4, 13

295×265, 330 / 11.6×10.4, 13

Cover lids / Hole for thermometer (mm)

5ea / Ø51, 1ea / Ø12.6

8ea / Ø51, 1ea / Ø12.6

Exterior (W×L×H) (mm / inch)

492×374×536 / 19.4×14.7×21.1

642×374×536 / 25.3×14.7×21.1

Net weight (kg / lbs)

28 / 61.7

37 / 81.6

Electrical requirements (230V)

60Hz, 13A 50Hz, 13A 60Hz, 13A 50Hz, 13A

Cat. No.

AAH43302K AAH43302K AAH43402K AAH43402K

※ The lowest temperature that can be controlled depends on changes in room temperature and sample temperature.Therefore, please contact the distributor of our products before purchasing for technical consultation.


Screenshot 2022-12-21 132016

Viscometer tube holders

Specially designed to hold a two-opening viscometer glass tube and made of Bakelite, renowned for its high thermal endurance.

Cat. No. Suitable for
AAA43501 VB-25G (need max. 5 holders)
VB-40G (need max. 8 holders)

Cooling circulators

The temperature range of viscometer heating baths can be lowered up to +10°C (+50°F) when used with an optional cooling circulator.

Cat. No. Description Suitable for
AAH57051K RW3-1025 (230V, 60Hz) VB-25G (230V, 60Hz)
AAH57651K RW3-1025P (230V, 60Hz)
AAH57052K RW3-1025 (230V, 50Hz) VB-25G (230V, 50Hz)
AAH57652K RW3-1025P (230V, 50Hz)
AAH57061K RW3-2025 (230V, 60Hz) VB-40G (230V, 60Hz)
AAH57661K RW3-2025P (230V, 60Hz)
AAH57062K RW3-2025 (230V, 50Hz) VB-40G (230V, 50Hz)
AAH57662K RW3-2025P (230V, 50Hz)

* More information on the cooling circulators.


LC GreenBox

Real-time monitoring and control of device operation via mobile app.
Up to 4 devices can be connected at once.

Cat. No. Description

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