If you need both pumped and non-pumped functionality, buying one monitor that can do both is often more cost effective and reduces the number of monitors your workers carry. The Ventis MX4 is available in both pumped and non-pumped versions, or can be used with the Ventis Slide-on Pump for pre-entry sampling. With the Ventis Slide-on Pump, you can eliminate the need for extra monitors and transition seamlessly from personal monitoring to confined space entry use. The Ventis Slide-on Pump is ideal for operators who wear their gas monitors primarily for personal protection, but occasionally require a pump for confined space entries. With the Ventis Slide-on Pump, you can: Conveniently sample from up to 50 feet away. Easily attach the pump with no tools. Simplify charging by using the same batteries as Ventis monitors.