Family Owned & Operated Since 1971• Bakersfield, CA
pH meters, conductivity meters, dissolved oxygen, ORP, and turbidity instruments
115 products
Pinpoint acoustic leak detector with digital display, 900 V/G sensitivity, and eight selectable high-pass / low-pass bandpass combinations (100 Hz–5000 Hz range). Includes Android smart-phone app for location logging. Direct successor to the LD-16 on SSI's 2026 lineup.
Drinking-water turbidimeter that meets EPA / ISO 7027 regulatory monitoring requirements. Low stray light, high stability, efficient bubble rejection, and 0.001 NTU display resolution — ideal for monitoring filtered drinking water at municipal water treatment plants where EPA reporting is mandatory. Two transmitter platforms: T56 (dual channel, smaller installations) and T1056 (four-wire, integrated turbidity + pH/conductivity for full WQS-style monitoring). EPA-compliant and ISO-compliant sensor variants available.
The CL205 is an Extech ExStik Replacement Chlorine Electrode Module. Product for use with Extech CL200 Meter. The CL205 is an electrode capable of measuring chlorine and temperature. Comes with a 6 month warranty.
The CL207 is a Chlorine Calibration Standard for CL200 ExStik Waterproof Chlorine Meter. Product comes with 3 ampules.
The Extech DO603 is a replacement screw-on membrane kit for the Dissolved Oxygen sensor (DO605) of a DO600 meter.
Replacement dissolved oxygen sensor for ExStik DO meter
Measure DO between 0.0 and 199.9%. Color coded for easy identification and installation. Lasts more than 1 year with typical usage and regular maintenance.
Conductivity Standard 2 Bottles -- 1 Pint Each
Conductivity Standard 2 Bottles -- 1 Pint Each
The Extech EC405 is an ExStik Replacement Conductivity Cell Module. For use with the EC400 Conductivity/TDS/Salinity Meter. It is an easy to clean, rugged conductivity cell module. Product comes with a protective connector cap and a one year warranty.
The EC505 is an ExStik Replacement pH Electrode/Conductivity Cell Module. For use with the Extech EC500 Waterproof ExStik II pH/Conductivity Meter. Measures conductivity, TDS, salinity, pH and temperature. Comes with a year warranty.
Cell for EC600/DO700. The Extech EC605 is a replacement or spare Conductivity Cell for use with the EC600 portable water conductivity meter and DO700 portable dissolved oxygen meter. Product comes with a six-month warranty.
Replacement Conductivity Probe with Protective Cap for EC700
The Extech FL704 is a set of 100 TISAB Fluoride Reagent Tablets. No messy powder reagents and no dosing equipment required.
Buffer Solution/ pH 10 2 One Pint Bottles
Extech PH103 are convenient, pre-measured pH calibration solutions for your meter. Included is a rinsing solution used for cleaning off the pH electrode before and after taking measurements to prevent contamination (6 pouches of pH4 solution, 6 pouches of pH7 solution, 6 pouches of pH10 solution, 2 pouches of rinse solution).
The Extech PH105 pH ExStik Electrode Module is an easy to clean, rugged flat surface pH electrode. It is interchangeable with the ExStik Chlorine or ORP meters and measures in liquids, semi solids and solids. Also, it has the ATC via the built-in PT-100 Ohm sensor. The Extech PH105 pH ExStik Electrode Module comes complete with the protective connector cap.
Replacement flat surface electrode for ExStik
The Extech PH305 is an electrode capable of measuring pH, mV and temperature. For use with the PH300 Waterproof pH/mV/Temperature Kit, EC600 Waterproof Conductivity Kit, and DO700 Portable Dissolved Oxygen Meter. Comes with a 6 month warranty.
Buffer Solution/ PH4 2 One Pint Bottles
Buffer Solution/PH7, Two One Pint Bottles
Replacement pH probe with protective cap for Extech EC700, 6-in-1 water quality meter. Measure pH between 2.00 and 12.00. Color coded for easy identification and installation. Lasts more than 6 months with typical usage and regular maintenance.
The Extech RE305 ORP ExStik Electrode Module is an easy to clean, rugged, flat surface ORP electrode that is interchangeable with ExStik chlorine or pH meters. It measures in liquids, semi solids and solids. The RE305 comes complete with the protective connector cap.
High-sensitivity sensor and magnet with 9.75-foot cable (LD-15 / LD-18).