Multi-position stirrers with nine-position capacityMulti-position stirrers with chemical-resistant surfaceMulti-position stirrers with low-end speed controlMulti-position stirrers with enhanced coupling

Multi-position stirrers

  • Ohaus - STMP4AL - STMP9AL - STMP4DG - STMP9DG
  • With four positions provide precise speed control and delivers repeatable performance

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STMP4AL

Model : STMP4AL

  • Capacity: 4 x 1L
  • Control: Analog
  • Dimensions: 4 in x 17 in x 11 in (970 mm x 432 mm x 279 mm) (HxLxW)
  • Synchronized and uniform mixing
  • Speed ramping feature slowly increases motor speed for enhanced coupling & improved stirring
STMP9AL

Model : STMP9AL

  • Capacity: 9 x 250mL
  • Control: Analog
  • Dimensions: 4 in x 17 in x 11 in (970 mm x 432 mm x 279 mm) (HxLxW)
  • Synchronized and uniform mixing
  • Speed ramping feature slowly increases motor speed for enhanced coupling & improved stirring
  • Microprocessor-controlled for precise speed regulation
  • Timer counts up or when programmed to a set time will turn off stirring & sound alarm when timer reaches zero
STMP4DG

Model : STMP4DG

  • Capacity: 4 x 1L
  • Control: Digital
  • Dimensions: 4 in x 17 in x 11 in (970 mm x 432 mm x 279 mm) (HxLxW)
  • Synchronized and uniform mixing
  • Speed ramping feature slowly increases motor speed for enhanced coupling & improved stirring
  • Microprocessor-controlled for precise speed regulation
  • Timer counts up or when programmed to a set time will turn off stirring & sound alarm when timer reaches zero

STMP9DG

Model : STMP9DG

  • Capacity: 9 x 250mL
  • Control: Digital
  • Dimensions: 4 in x 17 in x 11 in (970 mm x 432 mm x 279 mm) (HxLxW)
  • Synchronized and uniform mixing
  • Speed ramping feature slowly increases motor speed for enhanced coupling & improved stirring
  • Microprocessor-controlled for precise speed regulation
  • Timer counts up or when programmed to a set time will turn off stirring & sound alarm when timer reaches zero


Powerful Magnetic Stirrers available in either four or nine-position capacities provide precise speed control that delivers repeatable performance.

Offered in both digital and non-digital models.

Unique Features Include:

  • The 318 x 279 mm top plate accommodates up to 9 x 250 mL or 4 x 1 L flasks. The glass-filled nylon surface has a reflective white color, is chemical-resistant, and minimizes unintended heating of samples
  • The speed ramping feature slowly increases the motor speed for improved safety and enhanced coupling. Avoids splashing, improves spin bar control, and provides excellent low-end speed control
  • Digital models have touchpad controls for the input of speed and time. Non-digital models have an adjustment knob with dial markings from 1-10. The microprocessor regulates adjustments throughout the range
  • The 318 x 279 mm top plate accommodates up to 9x250 mL or 4 x 1 L flasks. The glass-filled nylon surface has a reflective white color, is chemical-resistant & minimizes unintended heating of samples
  • The speed ramping feature slowly increases the motor speed for improved safety and enhanced coupling. Avoids splashing, improves spin bar control and provides excellent low-end speed control
  • Digital models have touchpad controls for the input of speed & time. Non-digital models have an adjustment knob with dial markings from 1-10. The microprocessor regulates adjustments throughout the range
ModelSTMP4ALSTMP9ALSTMP4DGSTMP9DG
ControlAnalogAnalogDigitalDigital
Speed range60 rpm to 1400 rpm
Timer N/A N/A 1 second to 160 hours
Capacity 4 x 1 L 9 x 250 mL 4 x 1L 9 x 250 mL
Plate construction Glass Filled Nylon
Dimensions ( H x L x W) 4 x 17 x 11 in. / 10.2 x 43.2 x 27.9 cm
Plate Dimensions ( L x W) 12.5 x 11 in. / 31.8 x 27.9 cm
Net Weight 14 lb. / 6.3 kg
Power 120 V, 50/60 Hz
Power Consumption 75W 75W 90W 90W
Working Environment 41 °F – 104 °F, 80% RH*, non-condensing / 5 °C – 40 °C, 80% RH*, non-condensing

*RH = Relative Humidity