RS Pro General Purpose Mineral Insulated Probes. A series of RS Pro Temperature Probes. These probes can be carefully bent and shaped making them perfect for your application. All models are highly reliable and excellent quality. Features ; Benefits. Suitable for air or liquid measurement Type K probes are class I, type T probes are 1/2 class I Waterproof construction for ease of cleaning/sterilisation Cable Length is 2 m