High vacuum is suitable for use in operating theatres, intensive care units, trauma and casualty units, wards and any application where high vacuum is required. The suction controller enables the vacuum to be set at any level from 0 to full pipeline vacuum. The vacuum gauge is marked from 0 to -100 kPa and 0 to -750 mmHg. Low vacuum is suitable for paediatric applications or where a vacuum not exceeding -20kPa (-150 mmHg) is required. The vacuum gauge is marked 0 to -27 kPa and 0 to -203 mmHg. NB: The suction control knob is yellow. Thoracic suction is suitable for abdominal or pleural drainage or where a vacuum not exceeding -7kPa (-53 mmHg) is required. The vacuum gauge is marked 0 to -10 kPa and 0 to -75 mmHg. NB: The suction control knob is blue. Controllers are supplied with BS probes. Alternative probe types are available, including DIN and UL A probes. Units with remote probes are supplied with 2 metres of vacuum hose. Vacuum controllers are supplied with a gauge (marked in kPa and mmHg), disposable hydrophobic filter that acts as a safety overflow valve, an On/Off switch and vacuum adjustment knob.