Oil Test Centrifuge
Heated Oil Test Centrifuge Digitor 22 C
Methods: ASTM D 91, ASTM D96, ASTM D 893, ASTM D 1796, ASTM D2273, ASTM D2709, ASTM D 2711, ASTM D 4007, ASTM D 5546, API 2542, API 2548, BS4385, ISO 3734, ISO 9030, IP75, IP 359, NF M07-020, DIN 51793.
Orto Alresa – Digtor 22 C Oil test Centrifuge was designed for the determination of water and sediment in oil by the centrifuge method.
- capacity: 4 x 100 ml tubes / 8 x 100ml tubes
- Max speed 3,000 RPM / 2,425 xg
- The oil test centrifuge has a colour touch screen that is visible from more than 3 meters away.
- Centrifuge Tubes are in an upright position on the rest.
- Motorised double lock automatic lid lock system
- Emergency lid-lock release.
- Locking and protection against opening along the run
- Lid dropping protection.
- Automatic rotor recognition.
- Over-speed protection.
- Port in the lid for calibration and operation checking.
- Start, stop, open lid and short spin with adjustable speed buttons.
- Brushless, maintenance-free Induction motor.
- Memory with Rotors and adapters list on.
- Noise level: below 60 dB.
- Pre-heating program for rotor spinning and temperature selection.
- Hazardous gases input is not required.
Orto Alresa Digitor 22 C Versatile and effective centrifuges for oil applications.
Microprocessor-controlled heated centrifuge designed for the determination of Water and Sediment in Oil by the Centrifuge Method with 4 tubes of 8”, 6”, trace sediment and 28 “finger” tubes.
- Determination of Trace sediment in lubricating oil by centrifuge method
- Suitable for different-shaped tubes
- GRS: Gas release system option.
- Lid dropping protection.
- Port in the lid for calibration and operation checking.
- ULS: Unbalancing location system indicating on the screen the number of the bucket that produces the unbalance switch off.
- Speed programming in 10
- RPM/10 xg steps.
- PCBS: Progressive controlled acceleration and braking system up to 175 selectable ramps that prevent sample homogenization after separation.
- Several acoustic and visual messages warn the user of the device’s situation.
- Brushless maintenance-free Induction motor.
- Memory with Rotors and adapters list on.
- The last value remains in the memory of the centrifuge
- Option of free/locked adjustment of RPM/ RCF along the run.
Safety
- Lid provided with security systems:
– Automatic lid lock system, motorised with double lock.
– Emergency lid-lock release.
– Locking and protection against opening along the run.
– Lid dropping protection.
– Port in the lid for calibration and operation checking. - Unbalance detection and switch off.
- A protective safety ring between the centrifugation chamber and the housing.
- Chamber of centrifugation in stainless steel (easy cleaning).
- Rotors and adapters are autoclavable and easy to install by the user.
- Automatic disconnection for energy saving up to 8 h.
Gas Release System (GRS) – DIGTOR 22 C Series

The Gas Release System (GRS) is a dedicated safety accessory for the DIGTOR 22 C centrifuges. It is specially designed to extract and safely discharge vapours and aerosols generated during the centrifugation of petroleum samples.
During the centrifugation of petroleum products, the combination of solvents, heat, and sample composition produces potentially hazardous aerosols. The GRS addresses this risk by continuously extracting the vapour-rich atmosphere from inside the centrifuge chamber and routing it to a secure area.
Specifications of Oil Test Centrifuge Digitor 22 C Series
| Feature | DIGTOR 22 C (4-Place) | DIGTOR 22 C-8 (8-Place) |
| Max. Capacity | 4 × 100 ml tubes (8”/6”) | 8 × 100 ml tubes (8”/6”) |
| Screen Type | TFT Color Touch Screen | TFT Color Touch Screen |
| Max. Speed | 3,000 RPM | 3,000 RPM |
| Max. Relative Centrifugal Force (RCF) | 2,425 ×g | 2,425 ×g |
| Temperature Control | +5°C to 80°C (programmable) | +5°C to 80°C (programmable) |
| Heating System | Yes, with preheating function | Yes, with preheating function |
| Rotor Type | Swing-out | Swing-out |
| Available Rotors | RT 293 (4×100 ml, 8”/6”) | RT 294 (8×100 ml, 8”/6”) |
| RT 289 (4×100 ml, 8”) | ||
| Adapter Compatibility | ASTM cone, ASTM pear, ASTM trace, API finger tubes | ASTM trace tubes, API finger tubes |
| Timer Range | 1 second to 99 hours (programmable) | 1 second to 99 hours (programmable) |
| Acceleration/Deceleration Control | PCBS System – 175 selectable ramps | PCBS System – 175 selectable ramps |
| Safety Features | Automatic lid lock | Same features |
| Emergency lid-lock release | ||
| Unbalance detection | ||
| Overspeed protection | ||
| Lid drop protection | ||
| Chamber in stainless steel | ||
| Noise Level | Below 60 dB | Below 60 dB |
| Gas Release System (Optional) | Yes, with pre-installation | Yes, with pre-installation |
| Connectivity | Microprocessor controlled | Same features |
| Automatic rotor recognition | ||
| Data memory for rotor/adapters | ||
| Dimensions (W × D × H) | 530 × 640 × 420 mm | 530 × 640 × 420 mm |
| Net Weight | 77 kg | 77 kg |
| Voltage Options | 220–230 V / 110–120 V | 220–230 V / 110–120 V |
| Frequency | 50–60 Hz | 50–60 Hz |
| Power Consumption | 1,200 W | 1,450 W |
| Compliance | CE Mark | Same certifications |
| EN 61010-1, EN 61010-2-020, EN 61010-2-101, EN 61326-2-6, EN 61326-1 | ||
| ISO 3734, ISO 9030, ASTM, API, BS, IP Standards | ||
| Warranty | 3 Years | 3 Years |
Application of Oil Test Centrifuge Digitor 22 C Series
Crude Petrol :
Standard ISO 9030; With 8” conical tube – TU 030 and tube stoppers – PV 156
Crude Oil
Standards:
- ASTM D96 with: 8” conical tube -TU 030 or 6” conical tube -TU 050
- ASTM D4007 with: conical tube 8” – TU 030 and tube stoppers – PV 156
Lubricating oil :
Standards:
- ASTM D91 with 8” conical tube -TU 030
- ASTM D893 with 8” conical tube – TU 030
- ASTM D2273 with 8” trace tube – TU 056
- ASTM 2711 with 8” conical tube -TU 030
Biodiesel
Standard ASTM D2709: with 8” trace tube – TU 056
Fuel oil
Standards:
- ASTM D1796 with 8” conical tube – TU 030
- ASTM D2709 with 8” trace tube – TU 056
- ISO 3734 with 8” conical tube – TU 030
Polishes
Standard ASTM D1290: With 8” conical tube TU 030




