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First Stage intermediate pressure checker. A great aid for the diver that like his equipment in top working condition before the dive trip. The CT3 gauge will check the low pressure through a B.C. fitting. The First Stage Pressure Gauge will help you and your dive buddies know when to have your equipment serviced at the local dive store and avoid problems on the dive.
Every divemaster should have the CT3 gauge in his necessary tool box. A great unit for any dive store repair department.
Size is 1 5/8" wide. A good small size for any diver's tool box! 0-300 psi (21 kg/cm2).