

Stirrers and shakers · Overhead stirrers
JOANLAB overhead stirrer · OS-50Pro and OS-100Pro
50 and 100 L overhead stirrers with torque of up to 100 N·cm, a through shaft, temperature readout and an optional external probe.
- 50 and 100 L volumes
- Rated torque of 50 and 100 N·cm
- Maximum viscosity of 35,000 and 70,000 mPa·s
- Optional external temperature probe
Configurations, certifications, power supply, accessories and availability are confirmed in the quote.
Specifications
Summary datasheet
| Maximum volume | 50 L (OS-50Pro) and 100 L (OS-100Pro) |
| Speed | 100-2000 rpm (OS-50Pro); 50-1200 rpm (OS-100Pro) |
| Rated torque | 50 N·cm and 100 N·cm |
| Maximum viscosity | 35,000 and 70,000 mPa·s |
| Through shaft | Yes |
| Temperature probe | External, optional; not a standard accessory |
| Timer | 0 to 24 h |
| Chuck | 1-10 mm |
| Power | 80 W (OS-50Pro) and 100 W (OS-100Pro) |
| Power supply | AC 100-240 V with a 24 V DC / 4 A external adapter |
| Paddles | Three-blade and four-blade, 70 mm and 400 mm long, standard |
| Shipping package | 51 × 33 × 20 cm and 13.1 kg |
| Availability | Imported to order / to be confirmed |
The top of the ladder: 50 and 100 liters
The OS-50Pro states 50 L, 50 N·cm and 35,000 mPa·s reaching 2000 rpm; the OS-100Pro, 100 L, 100 N·cm and 70,000 mPa·s at 50-1200 rpm — double the torque and viscosity, prioritized over speed.
The high-end sensors
Only this family states a temperature and torque display, tip-over detection and one-click lock, with a paddle pass-through hole and 80 or 100 W.
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