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Description
Milwaukee MA840 Polarographic Dissolved Oxygen ProbeMilwaukee MA840 Polarographic Dissolved Oxygen Probe The Milwaukee MA840 is a polarographic replacement probe for the MW600 Dissolved Oxygen meter. Refillable probe has an oxygen permeable polytetrafluroethylene (PTFE) membrane sensor for measuring dissolved oxygen (DO) levels in aqueous solutions. The probe uses a platinum cathode and a silver chloride anode. It polarizes the oxygen passing through the membrane so that it can be measured to produce
Milwaukee MA840 Polarographic Dissolved Oxygen Probe
The Milwaukee MA840 is a polarographic replacement probe for the MW600 Dissolved Oxygen meter.
Refillable probe has an oxygen-permeable polytetrafluroethylene (PTFE) membrane sensor for measuring dissolved oxygen (DO) levels in aqueous solutions.
The probe uses a platinum cathode and a silver chloride anode. It polarizes the oxygen passing through the membrane so that it can be measured to produce stable, accurate readings.
Features:
- Reinforced plastic body for durability
- Built-in temperature sensor to achieve thermal equilibrium between the sensor and the sample for more accurate reading
- 10 inches long with a tip that tapers from 1-1/2" to 3/4" in diameter
- 10-foot cable with a 7-pin DIN connector for attaching to the meter
- Refill the probe with Milwaukee MA9071 Oxygen Electrolyte Solution
Specifications:
- Body: ABS
- Cathode: Platinum
- Anode: Silver
- Temperature Sensor: Yes
- Warranty: 6 months
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.2 ★★★★★
Based on 635 reviews
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Product Reviews
★★★★★ 5
This company makes great toys for pitts!!
Color: Blue/Medium, Size: Blue, Color: Blue/Medium, Size: Blue
Our pitt LOVES this toy. The rubber is reeeaally tough. It’s well designed because it’s a slippery surface. You can tell from the video there’s a lot of squeaking from him trying to get a good grip. He found a pretty good spot to hook his upper teeth into the crevasse, but his bottom teeth kept slipping.
As a side note, I wouldn’t leave any toy home alone with him that’s about 3 inches or smaller because dogs can choke on it, but that doesn’t make this any toy or company any less amazing. For toys I would leave home with a power chewer, take a look at that 4inch red ball made by this same company. He hasn’t made a dent in that thing and you can put treats in it. :)
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Reviewed in the United States on March 5, 2025
★★★★★ 1
No for aggressive chewer waste of money
Color: Blue/Medium, Size: Blue, Color: Blue/Medium, Size: Blue
Within 10 minutes she destroyed it
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Reviewed in the United States on June 1, 2026
★★★★★ 5
Favorite toy!
Color: Orange/Large, Size: Orange
My dog lives these!
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Reviewed in the United States on April 23, 2026
★★★★★ 5
Takes a beating - looks like new!
Color: Blue/Medium, Size: Blue
EDITED AGAIN, 12/28/22:
My boy still has his original blue one of these and the yellow one from way back. He's received a couple more over the years which he's managed to sneak out of the house and lose - evidently neighbor dogs or perhaps foxes, etc love them, too, and carry them off?! At any rate, he'd managed to get himself back to his original two, so I bought him a late Christmas present of a new yellow bone. He just opened the package (with help, of course - he's smart, but lacks the necessary opposing thumbs to do it on his own) and he was ecstatic! He reached into the mailing envelope, grabbed it, gave it a couple of triumphant tosses then ran for his bed, pulled a blanket in, and has been chewing, fighting with, burying in the blanket and "discovering" it for about a half hour now! I don't know what the attraction is, but he still loves these things and they're still lasting! The only other toys that have lasted more than a day are Nylabones (because he won't even look at them, let alone touch them) and a set of interlocked skinny rubber rings that he's not at all interested in, but if I ask about them, he'll move them around the room for a couple of days to make me feel better! LOL
EDITED TO ADD 2022:
Here I am, back 5 1/2 years later to say my dog STILL has this bone and makes use of it a couple of times a week. And he still loves it and sleeps with it. He has gone through a couple of the smaller version (yellow instead of blue) over this time frame because those get constant use. But that’s amazing in itself!! These are still the only toy I would call indestructible.
Great toy! I have a dachshund who destroys toys in record time. I can hear the amused chuckles now, but anyone who has seen him in action (including rottie, pit bull and Doberman owners) is in awe. He is very methodical and relentless - the mad genius of dog toy torture! Small and quiet but utterly ruthless.
Anyway...my boy has been working on this since the beginning of October and the thing looks like new! I think you can see one tooth mark, otherwise it looks untouched! This is a dog who can reduce Kongs and other rubber toys to a pile of chunks in minutes.
But he also LOVES it - carries it around, brings it into his bed at night to sleep, and when his doxie brother (who is far too dignified to do dog toys) doesn't feel well, it is offered up as a "feel better" snuggly...for about 2 minutes. But it's the thought that counts, right?
I don't know what makes this so attractive to my mini-Jaws and so long-lasting, but it works!
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Reviewed in the United States on February 3, 2017
★★★★★ 5
HEAVEY Duty!
Color: Blue/Medium, Size: Blue
Almost not destructible! My dogs chew through 99% of the toys we purchase, but never this one! The medium size is good for our Doberman with jaws of steel!
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Reviewed in the United States on May 4, 2026