WTW Measurement Systems, Inc.
Ft. Meyers, FL 33916-7597
Oct 17, 2002 Portable, waterproof, and submersible Multi 197i meter offers field testing for pH (or ORP), dissolved oxygen, conductivity, and temperature. Standard, individual sensor cable lengths up to 66 ft, or individual depth armatures allow for measurements from 80–330 ft. Meter includes GLP conforming memory (500 data sets) with real-time clock, RS 232 interface, and recorder output.

Cole Parmer Instrument Co.
Vernon Hills, IL 60061
Jun 17, 2002 Less sensitive to electronic noise, OAKTON pH 510 benchtop meter provides stable, repeatable readings. It includes quick reference, slide out instruction card, dual display/hold function that freezes readings, and memory storage that stores and recalls up to 50 measurements. Water-resistant membrane keypad protects meter from accidental spills. Meter is available with manual or automatic temperature compensation.

Cole Parmer Instrument Co.
Vernon Hills, IL 60061
Jun 17, 2002 OAKTON pH/Ion 2100 meter handles pH, ion concentration, mV, and temperature measurements. It features selectable 0.001/0.01 pH resolution with ±0.002/0.01 pH accuracy. Real-time clock marks calibration and stored data with date and time stamps. Users can calibrate pH and conductivity to up to five points and define schedules for recalibration. Nonvolatile memory stores up to 50 data sets, and meter's RS-232 output sends readings to printer or PC.

Extech Instruments Corp.
Waltham, MA 02451 1020
Feb 07, 2002 ExStik(TM) measures pH in liquids, semi-solids, and solids. Its Smart Chip indicates when electrode needs to be recalibrated or replaced. Measurements range from 0.00 to 14.00 pH with 0.01 pH resolution and accuracy. ExStik also measures temperatures from 23° to 194° F. LCD simultaneously displays pH and temperature readings, and includes analog bar graph. ExStik incorporates 1, 2, or 3 point calibration, and memory that stores/recalls 15 readings.

IQ Scientific Instruments, Inc.
San Diego, CA 92127
Jan 03, 2002 IQ400 combines pH module with Handspring Visor™ and Palm OS™ operating system. It features high/low pH level alerts, recalibration alarms, automatic buffer recognition, save/recall of up to 9999 records, and automatic temperature compensation. Data can be gathered and sent to PC, and last 50 calibrations are stored. Digitized handwritten notes and sketches can be saved with pH readings. Cradle allows handheld or benchtop use.

Kernco Instruments Co., Inc.
El Paso, TX 79927 7338
Dec 11, 2001 Portable Model 25-30 pH meter has resolution of 0.01 pH over full 0-14 pH range, 0-1400 mV recorder output, independent slope and buffer controls, and manual temperature compensation from 0-100°C.