Kronos Class S autoclave, 23 litres

The Kronos S 23 litre shares the base of the 18 litre but has a chamber 530 mm long: it takes 44 cm trays, handy for forceps, scissors and long instruments, and a day's load is done in fewer cycles. It works in Class S, with one vacuum before the steam and one after: it suits solid instruments, simple hollow instruments and small porous loads. Narrow-lumen hollow instruments, multiple wrapping and normal porous loads call for a Class B instead.

The ten programmes range from the rapid one for unwrapped instruments to the prion cycle. The motorised door stays locked under vacuum until the cycle ends, sensors adapt the cycle length to the working conditions and the display signals when maintenance is needed.

The built-in printer records every cycle on paper. The conductivity meter keeps an eye on the water at every load; the OSMO3 version purifies it straight from the mains supply, while the internal data logger saves cycles to a USB stick for archiving on the computer.

Features

• Class S with pre- and post-vacuum
• 10 preset sterilisation programmes, including the prion cycle at 134 °C
• Bowie & Dick and vacuum leak test programmes
• Built-in steam generator
• Motorised closing with the door locked under vacuum
• Conductivity meter for water quality
• Built-in thermal printer and multilingual four-button display
• Test result memory (Memory Test System)
• Front pump to fill the tank from a canister on the floor; manual or automatic draining
• Extra drying of 5 or 15 minutes, standby after 60 minutes and delayed start
• Outer panels with antimicrobial treatment
• Connection for an external data logger

Programmes

• Wrapped hollow instruments: 42 min at 134 °C, 53 min at 121 °C
• Wrapped solid instruments: 39 min at 134 °C, 50 min at 121 °C
• Porous loads: 53 min at 134 °C, 63 min at 121 °C
• Prions: 57 min at 134 °C
• Rapid: 33 min at 134 °C, 45 min at 121 °C
• Unwrapped hollow instruments: 40 min at 134 °C
• Bowie & Dick test: 38 min
• Vacuum leak test: 15 min

Times include preheating and drying and vary with the load and the power supply.

Technical data

• 23-litre chamber, ø 236 × 530 mm, AISI 304 steel
• Maximum load: 2 kg wrapped, 3.5 kg unwrapped, 0.5 kg porous
• 4 trays, 185 × 440 mm
• External dimensions 505 × 690 × 400 mm (width × depth × height), weight 58 kg
• Clearance to open the door: 350 mm
• 4-litre tanks for clean and used water
• Power supply 230 V, 50–60 Hz, power 2,400 W

Included

• 4 trays with tray holder and handle to remove them
• Water fill and drain hoses, sponge

Versions

• Internal data logger: records every cycle on a USB stick, to download to the computer
• OSMO3: separate reverse osmosis unit with carbon pre-filter, membrane and resin filter; connects to the mains water supply, works without electricity and can be placed up to 5 metres from the autoclave