Extech Oyster pH Meter
The Extech Oyster Series pH/mV/Temperature Meter has a rugged design for handheld or benchtop use.
Features
- Memory function stores and recalls 25 labeled readings
- °C/°F switchable
- Audible beeper to alert user when function is completed
Image | Part# | Product Description | Price | Stock | Order | |
---|---|---|---|---|---|---|
![]() | OYSTER-10 | pH/mV/temperature meter | $189.99 | Usually ships in 1-2 weeks | ||
![]() | OYSTER-15 | pH/mV/temperature meter kit with mini pH electrode, calibration buffers, and carrying case | $224.99 | Usually ships in 1-2 weeks | ||
![]() | OYSTER-16 | pH/mV/temperature meter kit with mini pH electrode, RTD temperature probe, calibration buffers, and carrying case | $275.99 | Usually ships in 1-2 weeks |



Image | Part# | Product Description | Price | Stock | Order | |
---|---|---|---|---|---|---|
![]() | PH103 | pH buffer solutions, 20 pack, includes pH 4, 7, 10 | $31.99 | Usually ships in 1-2 weeks | ||
![]() | 850185 | RTD (PT100) temperature probe (-22 to 482 F/-30 to 250 C) | $59.99 | Usually ships in 1-2 weeks | ||
![]() | 60120B | Mini combination pH electrode, BNC connector, 1m cable | $56.09 | Usually ships in 1-2 weeks | ||
![]() | 601500 | Standard combination pH electrode, BNC connector, 1m cable | $43.99 | Usually ships in 1-2 weeks |
The Extech Oyster Series pH/mV/Temperature Meter features a large LCD built into adjustable "flip-up" cover that displays pH or mV and temperature simultaneously. The microprocessor based meter has a splash proof housing and front panel tactile touch pad to slope and calibrate. The meter measures pH from 0 to 14pH, mV from -999mV to 999mV, and temperature from 32.0°F to 212.0°F (0.0°C to 100.0°C). The memory function stores and recalls up to 25 labeled readings.
Self diagnostics display codes help users troubleshoot electrodes, buffer, and temperature errors. The measurements are automatically or mannually temperature compensated, and the meter is calibrated at a 5 point buffer recognition (1.68, 4.00, 7.00, 10.00, 12.45) with adjustable values. An audible beeper will sound when a function is completed.
- pH range: 0.00 to 14.00pH
- pH resolution: 0.01pH
- pH accuracy: 0.02pH
- mV range: 999mV to 999mV
- mV resolution: 1mV
- mV accuracy: 2mV
- Temperature range: 32.0°F to 212.0°F (0.0°C to 100.0°C)
- Temperature resolution: 0.1°
- Temperature accuracy: 0.8°F/0.5°C
- Dimensions: 3.7 x 4.2 x 2" (94 x 107 x 51mm)
- Weight: 12oz (340g)
- (1) Meter
- (1) Neckstrap
- (1) 9V battery
In The News
Ocean acidification: University of Washington's giant plastic bags help control research conditions
With oceans becoming more acidic worldwide, scientists are getting creative in designing experiments to study them. For example, one group at the University of Washington is using giant plastic bags to study ocean acidification. 
 Each bag holds about 3,000 liters of seawater and sits in a cylinder-like cage for stability. The group at UW, made up of professors and students, is controlling carbon dioxide levels in the bags over a nearly three-week period, during which they are looking at the effects of increased acidity on organisms living near the San Juan Islands. 
 “These mesocosms are a way to do a traditional experiment you might do in a lab or classroom,” said Jim Murray, professor of oceanography at the University of Washington.
Read MoreNOAA Alaska buoy network to monitor North Pacific ocean acidification
National Oceanic and Atmospheric Administration scientists detected signs of ocean acidification in the waters that hold the vulnerable and valuable fisheries of the North Pacific off the coast of Alaska, but they only had a snapshot of the action. 
 
“We know that in this place were important commercial and subsistence fisheries that could be at risk from ocean acidification,” said Jeremy Mathis, a NOAA Pacific Marine Environmental Laboratory researcher and professor at the University of Alaska Fairbanks. 
 
To understand how ocean acidification affects the North Pacific, NOAA scientists created a mooring network that collects constant in situ data on parameters contributing to acidification. They hope it will reveal seasonal trends and patterns left out by their snapshots.
Read MoreCharles River Algal Blooms Stop Swimming and Launch a Floating Wetland
The Charles River used to be a swimming hotspot for Cambridge and Boston residents. 
 
 Decades of industrial pollution and nutrient runoff have degraded water quality and eliminated public swimming in the Lower Charles, but a movement is afoot to get Boston and Cambridge back in the water. One step toward the goal of a safely swimmable river—without the need to obtain a permit, as is now necessary—is detecting and managing the harmful algal blooms that appear on the river. 
 
 An experimental floating wetland and new research and analysis of water quality data that shows a possible effective detection system for algal blooms on the Charles River are two new steps toward the goal of safe, accessible swimming.
Read More