The Model 101 P7 Water Level Meter from Solinst features durable PVDF flat tape with laser markings every 1/100 foot or millimeter, certified traceable to National Standards. The tape has high tensile strength, abrasion resistance and electrical efficiency. The P7 Probe is submersible to 1000 ft. Standard Model 101 P2 Water Level Meters with heat embossed markings are also available. Solinst Canada Ltd. www.solinst.com