The Seametrics IP816/IP826 series magmeter is now obsolete. As a replacement, you can get the IP813/IP823 series magmeter, choosing the Data Logger option. For reference, the obsolete IP816/IP826 specifications were:
Type: With Mounted DL76
Material: Brass, PVC, 316 SS or polypropylene with PVDF (Kynar®) rotor
Usage: for 1/2″-8″ pipes
Tamper Evidence: Tamper-evident kit option available