LaMotte WaterLinkⓇ Spin TouchⓇ photometer is an electronic water testing device that does all your pool and spa water testing for you. This system is so simple that anyone can use it, even the new guy! No vials to fill, no prep time, and no guesswork.
The 3581 case is built for transport. It is a more heavy-duty case, but it orients the Spin Touch vertically when transported. Poolsure techs use this case to protect the Spin Touch during frequent travel.
The 3582 case is an "ammo can" style case that isn't as heavy-duty as the 3581, but it keeps the SpinTouch device horizontal when moved around. This makes is better for use at a single pool or property, especially if the operator is using the 3x disks and leaving them in the Spin Touch between uses.
If the SpinTouch will travel between many properties, choose the 3581 case. If the Spin Touch will be used at a single property, choose the 3582 case.