V 1.6 Gen 2 Revised 9/21 Mini Lab Grade D.O. Probe Reads Dissolved Oxygen Range 1 − 50 mg/L Accuracy Response time Temperature range °C Max pressure +/– 0.2 mg/L ~0.5 mg/L/per sec 1 − 50 °C 689 kPa (100PSI) Max depth 70m (230 ft) Connector Male SMA Cable length 45cm (18") Internal temperature sensor Time before recalibration Life expectancy Maintenance No ~6 Months 2.
Measurements Cable Length 45cm (18”) 26mm (1”) Ø 2.6mm Ø 8mm Included with probe 23mm (0.9”) 30ml Dissolved Oxygen Electrolyte Solution 63mm (2.4”) 40mm (1.5”) Replacement Membrane Cap 12mm (0.
Specifications Max depth Cable length Weight Speed of response Dimensions SMA connector Membrane type Sterilization Food safe 70m (230 ft) 45cm (18") 52 grams ~0.5 mg/L/per sec 12mm x 89mm (0.47" x 3.4") Male PTFE Chemical only Yes Materials EPDM Ryton PVC Polyethylene Black Derlin This Mini Dissolved Oxygen 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, Mini Dissolved Oxygen Probe Part # ENV-20-DOX Complies with NSF/ANSI Standard 51 PVC EPDM Polyethylene Ryton Titanium Nitride PVC NSF-51 Compliant Ryton NSF-51 Compliant EPDM NSF-51 Compliant Black Derlin NSF-51 Compliant Polyethylene NSF-51 Compliant Titanium Nitride NSF-51 Compliant 4 Copyright © Atlas Scientific LLC Black Derlin
Operating principle A galvanic dissolved oxygen probe consists of a PTFE membrane, an anode bathed in an electrolyte and a cathode. Oxygen molecules defuse through the probes membrane at a constant rate (without the membrane the reaction happens to quickly). Once the oxygen molecules have crossed the membrane they are reduced at the cathode and a small voltage is produced. If no oxygen molecules are present, the probe will output 0 mV. As the oxygen increases so does the mV output from the probe.
This galvanic dissolved oxygen probe is a passive device that generates a small voltage from 0mv – 60+ mv depending on the oxygen saturation of the PTFE sensing membrane. This voltage can easily be read by a multimeter or an analog to digital converter. 0 0 0 0 V V How often do you need to recalibrate a dissolved oxygen probe? Because every use case is different, there is no set schedule for recalibration.
Extending the probe cable length You can extend the cable to greater than 100 meters with no loss of signal. Atlas Scientific has tested up to 300 meters without a problem, however you run the risk of turning your D.O. probe into an antennae, picking up noise along the length of your cable. If you want to extend your cable, we recommend that you use proper isolation, such as the Basic EZO TM Inline Voltage Isolator, or Tentacle Shield. Be sure to calibrate your probe with the extended cable.
How to add more electrolyte solution During usage, a small amount of electrolyte solution within the dissolved oxygen probe will deplete. In this case, you will need to add more solution into the probe. To add more electrolyte solution: Carefully unscrew the probes membrane cap, and drain any remaining electrolyte solution. Using the supplied syringe, inject solution into the membrane cap until it's filled to the top. Screw membrane cap back onto probe. Once the probe is reassembled, rinse of the probe.
How to recondition the Mini Lab Grade Dissolved Oxygen probe During usage, a small amount of corrosion (zinc oxide) may build up around the anode of the probe, this will cause irregular readings. In this case, you will need to recondition the probe. To recondition the probe: Carefully unscrew the probes membrane cap, and drain any remaining electrolyte solution. Using a small file, carefully file off the corrsion buildup around the anode of the probe. Do not file the cathode, as this will damage the probe.
Probe cleaning Over time dissolved oxygen probes can become dirty and covered in chemical deposits. Soft coatings can be removed by lightly brushing around the sides of the probe and membrane cap. If the probes membrane is in need of cleaning, use a mild bleach mixture to gently wash away any deposits. DO NOT USE A BRUSH TO CLEAN THE MEMBRANE If the probes membrane is ripped it must be replaced, as it will cause irregular readings.
