V 2.3 Gen 2 Revised 9/21 Micro pH Probe Half-cell − silver / silver chloride with EXR Glass Reads pH Range 0 − 14 Resolution +/- 0.001 Accuracy +/– 0.
Measurements Cable Length 61cm (2’) Ø 2.6mm Ø 8mm 9.8mm (0.3”) Ø 9.1mm 24.1mm (0.9”) Thread size 1/4 28 UNF 21.5mm (0.8”) 14.3mm (0.5”) Soaker cap ~3.8 pH 4mm 6.2mm (0.
Specifications Reference electrode Max depth Cable length Weight Speed of response Isopotential point Dimensions SMA connector Sterilization Food Safe Silver / silver chloride 60m (197 ft) 61cm (2') 29 grams 95% in 1 second pH 7.00 (0 mV) 6.2mm x 24.1mm (0.2" x 0.9") Male Chemical only Yes BELOW -5 °C Materials PEEK PVC Polyethylene Glass Titanium Nitride The Micro pH probe can be fully submerged in fresh or salt water, up to the SMA connector indefinitely.
NSF/ANSI 51 Compliant Atlas Scientific LLC, hereby certifies that, Micro pH Probe Part # ENV-10-pH PVC Complies with NSF/ANSI Standard 51 Polyethylene Titanium Nitride PVC NSF/ANSI 51 Compliant Glass PEEK NSF/ANSI 51 Compliant PEEK NSF/ANSI 51 Compliant Polyethylene NSF/ANSI 51 Compliant Titanium Nitride NSF/ANSI 51 Compliant 4 Copyright © Atlas Scientific LLC Glass
Attention Micro pH probe 5 Copyright © Atlas Scientific LLC Atlas Scientific Reference Probe This is a half-cell pH probe. It MUST be connected to a reference probe before it will work.
No readings Unpredictable results Atlas Scientific Reference Probe Atlas Scientific Reference Probe Reference Probe Atlas Scientific Correct In order to take accurate readings, both the pH and Reference micro probes must be placed within the same sample of liquid. Atlas Scientific Reference Probe 6 Copyright © Atlas Scientific LLC Half-cell SMA breakout boards create a single output, just like a normal probe.
Half-cell operating principle Back in the day, pH probes would come with a separate reference probe, which is crucial for accurate readings. Modern day pH probes have the reference built in, creating an all in one package. In order for Atlas Scientific to get the size of our Micro pH probe down to 6.2mm, we had to separate the reference into its own micro probe. Both pH and reference micro probes are needed in order to take accurate readings.
Unique behavior Atlas Scientific’s microprobe technology has some unusual properties. Unusual calibration slope After calibrating a micro pH probe, the slope of the pH probe can be < 70%. This is what you would expect to see on an older pH probe that’s at the end of its life. However, the probe behaves normally and shows no loss of sensing capabilities. The exact resonating for this phenomenon remains unknown to us. Unaffected by drying pH probes need to be kept wet at all times.
EXR advanced sensing glass Our newest Micro pH probes have EXR advanced sensing glass. The EXR advanced sensing glass has been specially formulated; allowing for faster reactions and more accurate readings in low ionic solutions.
Example setup A 1 5 10 15 1 5 10 15 A A B B B A C C C C D D D D E E E E B F F G G H H H H I I I I J J J J 1 Atlas 5 Scientific Reference F G Probe F G 10 15 Correct 10 Copyright © Atlas Scientific LLC 1 Atlas5 Scientific 10 15 Correct
A pH electrode is a passive device that detects a current generated from hydrogen ion activity. This current (which can be positive or negative) is very weak and cannot be detected with a multimeter, or an analog to digital converter. This weak electrical signal can easily be disrupted and care should be taken to only use proper connectors and cables.
NEVER EXTEND THE CABLE WITH CHEAP JUMPER WIRES! A 1 5 10 15 20 A B B C C D D E E F F G G H H I I J J 1 5 15 15 20 DO NOT CUT THE PROBE CABLE WITHOUT REFERRING TO THIS DOCUMENT! 12 Copyright © Atlas Scientific LLC
Improve response time Vigorously stir the probe in the sample, calibration solution, or rinse solution. This action will bring solution to the probes surface quicker and improve the speed of response. Response time Probe cleaning Coating of the pH bulb can lead to erroneous readings including shortened span (slope). The type of coating will determine the cleaning technique. Soft coatings can be removed by vigorous stirring or by the use of a squirt bottle.
