The Bluelab Meter Carry Case allows users to take readings without removing the meter from its protective case. An adjustable nylon strap can be used to hang the case and meter on the wall or over a shoulder so only the probe goes near the nutrient solution. The caseÂ’s firm shell with zipper closure protects the meter against accidental impact, and the net pocket and straps inside keep the meter and probes securely in place.