Solinst 615 Drive Point Piezometer Configuration:615C - 6in SS, 1/4" Compression The Aqua TROLL 500 is

The Aqua TROLL 500 is a fully customizable five-port multiparameter sonde with capacity for four interchangeable sensors and an antifouling wiper

it reads formaldehyde concentration over a 15-minute (0–1

and probe & instrument quality certificates with quick reference guide

and DO sensor included

Solinst 615 Drive Point Piezometer Configuration:615C - 6in SS, 1/4" Compression The Aqua TROLL 500 isThe Solinst 615 Drive Point Piezometer is a stainless steel screened point that is hammered directly into the ground rather than placed in a drilled hole. It threads onto 3 4" NPT stainless steel drive pipe extensions and is driven with a slide hammer acting on a drive head assembly, adding extensions and driving in turn until the target depth is reached. All variants share the same 3 4" stainless steel body and 50 mesh stainless screen, differing