Multi-position stirrers
- Ohaus - STMP4AL - STMP9AL - STMP4DG - STMP9DG
- Independent LED displays for speed and time
- Knob with 1-10 dial markings ( on non-digital models)
- Cast aluminum housing
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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

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

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

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 deliver 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.
• 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 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.
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 input of speed & time. Non-digital models have an adjustment knob with dial markings from 1-10. The microprocessor regulates adjustments throughout the range.
Model | STMP4AL | STMP9AL | STMP4DG | STMP9DG |
Control | Analog | Analog | Digital | Digital |
Speed range | 60 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