| Technical details | OST-25 | OST-40 |
| Stirring quantity (H20): | 25 l | 40 l |
| Max. viscosity: | 10.000 mPas | 30.000 mPas |
| Motor rating input/ouput: | 59 W / 45 W | 59 W / 45 W |
| Output at stirring shaft: | 42 W | 42 W |
| Max. ON-time | 100% | 100% |
| Max. torque at chuck (100rpm) | 20 Ncm | 40 Ncm |
| Speed range | 50 - 2.000 rpm | 50 - 1.000 rpm |
| Speed display: | digital (LED) | digital (LED) |
| Speed control: | stepless | stepless |
| Setting accuracy speed: | ± 1 rpm | ± 1 rpm |
| Reversible direction of rotation: | yes | yes |
| Power intermittent operation | yes, (resumes from last run) | yes, (resumes from last run) |
| Chuck range: | 0,7 - 10 mm | 0,7 - 10 mm |
| Extension arm diameter: | 13 mm | 13 mm |
| Length of extension arm: | 160 nm | 160 nm |
| Timer (LED): | Yes | Yes |
| Timer setting range: | 1 min - 99 hr 59 min & continuous. | 1 min - 99 hr 59 min & continuous. |
| Protection class: | IP 54 (acc. to DIN EN 60529) | IP 54 (acc. to DIN EN 60529) |
| Protection: | Overload, overcurrent, overtemperature | Overload, overcurrent, overtemperature |
| Voltage: | 100-240 V | 100-240 V |
| Frequency | 50/60 Hz | 50/60 Hz |
| DC voltage: | 24 V | 24 V |
| Housing material | Thermoplastic polymer | Thermoplastic polymer |
| Dimensions in (WxHxD): | 79 x 173 x 176 mm | 79 x 173 x 176 mm |
| Net weight: | approx. 1,4 kg | approx. 1,4 kg |
