Hach Intellical PHC705 Laboratory High Alkalinity Range pH Electrode
Features
- RedRod technology
- Free ground shipping
- Expedited repair and warranty service
- Lifetime technical support
- More
Overview
The Hach Intellical PHC705A is a digital combination pH electrode with a built-in temperature sensor. The PHC705A is a pH refillable electrode with a ceramic porous pin reference junction embedding the RedRod technology to deliver exceptionally fast, stable, and accurate response times for accurate measurements within a wide temperature range. A 59-mL bottle of saturated KCl Electrode Filling Solution is included with the probe.
Applications
Thanks to its special pH glass bulb composition, this high-performance laboratory glass pH electrode is particularly suited for measuring pH in alkaline aqueous samples for pH above 12. The PHC705 is not suitable for use with organic solvents, emulsions or sample types with high solids content.
Accuracy: ±0.01 pH
Application: High Performance/High Alkalinity
Cable Length: 1 m (3.28 ft)
Electrode Type: RedRod / Refillable Reference Element
Filling Solution: Saturated KCl (#25118026)
Junction: Porous Pin Junction
Kit?: No
Length: 200 mm (7.87 in.)
Method Type: Laboratory: RedRod / Refillable Reference Element
Parameter: pH
Probe Type: Standard
Product Kit: Model: PHC705A
Accessories Included: None
Range: 0 - 14 pH
Reference Type: Red Rod
Resolution: 0.001/0.01/0.1
Sample depth: 18 mm (0.71 in.)
Sensor material: Glass
Sensor Type: pH Glass
Sodium (Alkalinity) error: <0.3 pH at pH 14 in 1 M NaOH
Special Features: High-alkalinity samples
Temperature Accuracy: ±0.3 °C (±0.54 °F)
Temperature Range: 0 - 100 °C (32 - 212 °F)
Temperature Resolution: 0.1 °C (0.18 °F)
Test requirements Parameter Needed: pH
Minimum Sample Depth (mm): 18
Thermistor: ATC
Warranty: 12 months
Weight: 0.1 kg
What's included?: IntelliCAL PHC705A Laboratory pH electrode with storage soaker bottle, 1 m cable, 59-mL bottle reference electrolyte filling solution (Saturated KCl solution), Test certificate, and Basic User Manual.
In The News
Cross-Border Sewage Contaminated Flows: Monitoring the Tijuana River
The Tijuana River runs across the US-Mexico boundary, flowing into and throughout southern California, carrying with it nutrients and contaminants throughout the estuary. In recent decades, the flows have been heavily polluted with untreated sewage from the City of Tijuana. 
 
The wastewater enters the greater Tijuana River estuary, impacting coastal communities and disrupting the natural environment. In order to better understand these cross-border flows, researchers out of San Diego University sought to monitor the waterway test the capabilities of in-situ sensors to measure the contaminated water. 
 
Natalie Mladenov and Trent Biggs were two of the researchers involved in the project, deploying a real-time monitoring system in May of 2021.
Read MoreUsing Data Buoys to Track Sharks in Cape Cod
Despite the bad rap sharks often get in the media, they are incredibly important to marine ecosystems. Still, sharks residing in coastal, high-traffic areas can pose a risk to public safety—as a result, shark tracking and monitoring projects are often conducted in these waters. 
 
Regardless of the bad press, biologists like Gregory Skomal, a Senior Fisheries Scientist with the MA Division of Marine Fisheries, have always been interested in learning more about shark behavior for the sake of informing conservation efforts. 
 
“I was passionate about sharks as a child. I wanted to be a marine biologist, and pursued it through my education and ended up where I am today,” recalls Skomal.
Read More2025 Essential Water Monitoring Gear
Stay ahead of the curve with five of the top water monitoring products for 2025. Technological advancements and manufacturing innovations are leading to better quality data, improved price points, and enhanced user experience. And, while the ‘essentials’ list includes several new products, two tried-and-true measurement instruments continue to take a top spot for portable instrumentation. 
 
 These five products were developed by industry-leading suppliers, and in addition to extensive manufacturer testing, our science team tested and verified each instrument’s performance at the Fondriest Center for Environmental Studies .
Read More