Best Water Quality & Instrumentation
For the best results use high quality TENS unit electrodes pads like. Syrtenty. universal replacement electrodes for all. TENS, EMS & IF. units using snap or pigtail pin type connectors in order for the TENS machine to work best for you. PREMIUM QUALITY These electrodes for TENS unit pads are reusable several times with proper care.
Reviews
Find Best Price at Amazon"I have had a horrible time finding good replacement electrodes for my TENS unit. I assume that is a requirement for these types of items, but it is the first time I have actually seen that for electrodes that I have ordered online."
"They keep their sticky longer and I appreciate that they are cloth and not foam, which is less flexible."
"I got quite a few, as most of the others I'd used weren't sticky after a couple of uses, and I was using it quite frequently due to nerve 'aggravation' following surgery. I've attached a picture of the connectors from my TENS unit next to a ruler and the electrode connectors."
"The reasons that I am so happy with these Syrtenty 2" Square TENS Unit Electrodes 2x2 -... is that they are high quality and last a very long time."
"My wife uses her TENS unit 18 hours per day plus, so we use a lot of electrodes, but these are the best yet."
"I have a BODYMED Model 250 TENS unit which came with 4 small 1 inch square pads. These are much better than the pads that came with the unit."
Trusted Quality: Designed with you in mind, our premium pads are latex-free and non-irritating to ensure users of all skin types have a safe, comfortable experience! Shop Risk Free: DONECO has quickly become the go-to brand for innovative, practical products that help make your life easier!
Reviews
Find Best Price at Amazon"Wife loves these better than the original ones supplied with the machine when we bought it."
"Great deal, Quick delivery, I think I have a lifetime supply now!"
"Very sticky and great for multiple uses."
"Great product, used several times before I had to use a new set."
"Always great to have these on hand!"
"Very sticky pads, so glad I found a pad that will stick with many uses."
"Perfect size for neck, back or knees."
"Out of the first 8 that I put on, HALF OF THEM "bit" into my skin, shocking through the pad and drawing blood even on the lowest setting."
For the best results use high quality TENS unit electrodes pads like. Syrtenty. universal replacement electrodes for all. TENS, EMS & IF. units using snap or pigtail pin type connectors in order for the TENS machine to work best for you. PREMIUM QUALITY These electrodes for TENS unit are reusable several times with proper care & storage.
Reviews
Find Best Price at Amazon"I have had a horrible time finding good replacement electrodes for my TENS unit. I assume that is a requirement for these types of items, but it is the first time I have actually seen that for electrodes that I have ordered online."
"They keep their sticky longer and I appreciate that they are cloth and not foam, which is less flexible."
"I got quite a few, as most of the others I'd used weren't sticky after a couple of uses, and I was using it quite frequently due to nerve 'aggravation' following surgery. I've attached a picture of the connectors from my TENS unit next to a ruler and the electrode connectors."
"The reasons that I am so happy with these Syrtenty 2" Square TENS Unit Electrodes 2x2 -... is that they are high quality and last a very long time."
"My wife uses her TENS unit 18 hours per day plus, so we use a lot of electrodes, but these are the best yet."
"I have a BODYMED Model 250 TENS unit which came with 4 small 1 inch square pads. These are much better than the pads that came with the unit."
Best Conductivity Meters & Accessories
A TDS meter (aka ppm pen, nutrient tester, tds stick) is an inexpensive and convenient digital tool to instantly check your overall water quality. The lower the TDS level, the purer the water, with 0 ppm being pure H2O. This TDS tester is ideal for all water purification applications, wastewater regulation, aquaculture, hydroponics, and colloidal silver.
Reviews
Find Best Price at Amazon"Readings are very accurate (I'd have to guess within 2% most (90%) of the time (when tested with a more expensive laboratory model--I've worked in a chem lab for 40 years)."
"We received from a third party supplier Solutions that were calibrated for TDS to Micro siemens (μS)not ppm. When I bought the 342 ppm solution to confirm, I was reading 155 ppm. When I tried to adjust the meter with the adjustment screw, the highest I could get up to was 221 ppm."
"However, note that the picture Amazon provides is apparently the TDS-4TM, which is NOT what you'll receive if you select the "Ships and Sold by Amazon.com" option."
"We use it to check our tap water as well as drinking water we buy."
"We have a reverse osmosis water filter at home and this meter help us to monitore when to change filter cardiges, etc."
"it works, found out that my reverse osmosis drinking water is better than a bottled water."
"As a result, I ordered the 342 ppm calibration solution to check the calibration of the new meter. On 12-22-17 I received the calibration solution, I attempted to calibrate the meter but found that the meter would not adjust."
"Says for more information about calibration and maintenance to go to a link that does not work."
Best Dissolved Oxygen Meters & Accessories
Package Contents: 1 x Tacklife PM01 pH Meter. 1 x pH Buffer Powder (for calibration). 1 x User Manual. 1 x Package Box.
Reviews
Find Best Price at Amazon"This is an easy to use PH meter."
"Shipping was slow (I knew that before I ordered), but the price was right, and the meter itself is decent."
"Great ph meter, easy to use and is accurate."
"Very good quality, and Fast delivery."
"Great experience, happy with the product."
"Took a min to figure out how to calibrate it but once you get that done it works pretty good for the money."
"The product is good."
"Does what its suppose to do."
Best Dosimeters
For the best results use high quality TENS unit electrodes pads like. Syrtenty. universal replacement electrodes for all. TENS, EMS & IF. units using snap or pigtail pin type connectors in order for the TENS machine to work best for you. PREMIUM QUALITY These electrodes for TENS unit pads are reusable several times with proper care.
Reviews
Find Best Price at Amazon"I have had a horrible time finding good replacement electrodes for my TENS unit. I assume that is a requirement for these types of items, but it is the first time I have actually seen that for electrodes that I have ordered online."
"They keep their sticky longer and I appreciate that they are cloth and not foam, which is less flexible."
"I got quite a few, as most of the others I'd used weren't sticky after a couple of uses, and I was using it quite frequently due to nerve 'aggravation' following surgery. I've attached a picture of the connectors from my TENS unit next to a ruler and the electrode connectors."
"The reasons that I am so happy with these Syrtenty 2" Square TENS Unit Electrodes 2x2 -... is that they are high quality and last a very long time."
"My wife uses her TENS unit 18 hours per day plus, so we use a lot of electrodes, but these are the best yet."
"I have a BODYMED Model 250 TENS unit which came with 4 small 1 inch square pads. These are much better than the pads that came with the unit."
Best Electrodes
For the best results use high quality TENS unit electrodes pads like. Syrtenty. universal replacement electrodes for all. TENS, EMS & IF. units using snap or pigtail pin type connectors in order for the TENS machine to work best for you. TENS Electrodes Pads are used for electro stim TENS therapy like EMS and electrode massager.
Reviews
Find Best Price at Amazon"I have had a horrible time finding good replacement electrodes for my TENS unit. I assume that is a requirement for these types of items, but it is the first time I have actually seen that for electrodes that I have ordered online."
"The reasons that I am so happy with these Syrtenty 2" Square TENS Unit Electrodes 2x2 -... is that they are high quality and last a very long time."
"My wife uses her TENS unit 18 hours per day plus, so we use a lot of electrodes, but these are the best yet."
"Fits any standard snap on electrode cords."
"I also like to get myself a set of longer pads for the days when my pain covers a larger area. I think the best thing to do is to use one of those little alcohol pad wipes you get when you order ribs at a restaurant. Grabbing the short edge opposite to the cord, pull it off slowly so you don't cause tears or air bubbles under the gel side. 4) If you feel any sharp pains when using it (like tiny pin pricks), this means the gel has dried out. : • At the posting of this review, this is eligible for free shipping to members of Amazon Prime; always a great thing in my opinion."
"I have had a horrible time finding good replacement electrodes for my TENS unit. The quality of these electrodes is excellent and they are a tad larger than the ones that came with my TENS unit."
"The gel material really keeps contact with the skin so there's no bad tingling zap that happens when the other pads come slightly loose."
Best Spectrometry
Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities.
Reviews
Find Best Price at Amazon"On the blue side of the spectrum mine was off 5nm, and in the middle of the spectrum (green) mine was off 3nm in the other direction. I calibrated mine in both the blue and green wavelengths, but don't have good way to calibrate the red end of the spectrum due to lack of a know wavelength source in that range. It takes time and effort to collect meaningful performance data and write a quality review -- If you found this review helpful please vote 'Yes!"
"Also if the light source is not very bright then you might not be able to see the scale since it uses ambient light to make it visible."
"However, it is still useful for what I wanted -- checking the smoothness of the light from LED lamps and CFLs."
"Good for rating light color temps."
"This spectroscope is fun and easy to use."
"Works well, wish gradients were further defined."
"This item is also a useful photography accessory - if you plan on using a light, a quick check of the spectra can give you an idea of how good the colors will be."
"Seeing how different light sources give out light at various parts of the spectrum amazes me."
Best pH Testing
Which is why, maintaining an alkaline state not only promotes a balanced body but also, a balanced mind. ✅WHEN IT COMES TO YOUR HEALTH, TEST DON’T GUESS! – If you are looking for an easy, reliable and cost-effective way to accurately monitor the pH levels in your urine or saliva, then the HealthyWiser pH test strips are going to make your life easier! Dual pad ensures super accuracy with results in 15 seconds & are made out of high-quality imported filter paper & reagent from Germany and Japan so strips won't bleed like litmus paper.
Reviews
Find Best Price at Amazon"I just attributed it to the fact that I have been working many long hours, not getting enough sleep and slacking on my healthy diet. So when I had the opportunity to try out these HealthyWiser pH Test Strips complimentary in exchange for my honest review, I was intrigued. I have used pH strips to test out the water in our fish tank, but never heard of them to use as a health aid. When your pH levels aren’t properly balanced, you can experience physical symptoms such as indigestion, fatigue, body pain, and headaches. If you try out these test strips on a day you aren't feeling so great, chances are your pH level is probably on the acidic side. Reduce or eliminate acidic beverages such as soda, alcohol, coffee, processed fruit drinks, and energy drinks.etc. Eat lots of low acid fruits and increase your intake of green, leafy vegetables. Personally, I think this product is great for anyone into natural medicine and those who need to keep to a strict diet such as diabetics or people who suffer from any type of digestive illness. After testing your pH daily, you will probably realize that it is time to get your diet and eating habits back on track."
"Disclaimer: Before making a purchase, I research a product thoroughly, and I depend on honest reviews to aid in my decision making. This product was received for free or at a discount in exchange for an honest and unbiased review. While I have shaken my head at some of the 5-star reviews I have seen other professional reviewers give to lousy 1-star products, simply because they received them for free, I do my best to keep my reviews thorough and unbiased."
"PH testing is a great diagnostic tool you can use to assess your general health & well being."
"Well sealed packaging."
"Strips are easy to read and compare against the enclosed chart."
"May need to have a redesign on the lid."
"Good product."
"These are too hard open the container."
Best Lab Turbidity Meters
* 4 Display modes: press SHIFT button: TDS - ppm & °C, EC - µs/cm & °C, TDS - ppm & °F, EC - µs/cm & °F. It can also be used as a TDS meter for coffee or a TDS meter for drinking water to ensure your H20 is clean and healthy!
Reviews
Find Best Price at Amazon"I never realized how low the quality of city water I have in my house."
"I have this test pen for 3 months, just press the button to test your water quality, it can turn off automatically in about 5 minutes."
"The well is 780 feet deep and is pumping water, or sucking water through wet sand, this is not good, and makes the water hard."
"This is a good TDS meter!"
"Very good price, seems to be working well."
"!Just dip it into the water and if you can't see the digits there, press the hold button and pull it out."
"I not only use it for the hot tub, I'm also using it to test the aquarium water for our two fish tanks."
"This product is really helpful, very easy to use and give me a number that I am drinking a clean water.would recommend to a friend."
Best Lab Calorimeters
Superior quality double wall calorimeter with easily removable spring heating element unit.
Find Best Price at AmazonBest Lab Hydrometers
Then you need the Brewer's Elite Deluxe Triple Scale Hydrometer Set! ★ ALL IN ONE - Triple scale hydrometer easily measures specific gravity, potential alcohol and brix, to easily measure density of fermentation liquids. We are so certain that this Premium Triple Scale Hydrometer Kit will satisfy you that we offer a 90 day no-questions-asked refund policy! ★ Easily calculate Alcohol % (ABV) - Graduated color bands help you know when you brew is ready, and our Crystal clear fonts are so easy to read.
Reviews
Find Best Price at Amazon"I brew home wines in store-bought jugs of juice with this and a cheap carbouy vent. This product is a quality measuring tool."
"Very nice hydrometer with easy to read color coding for those of us with aging eyes."
"The Hydrometer arrived quickly and in great condition."
"The hydrometer looks very nice."
"Beginner homebrewer seems to works fine."
"I gave this a 5 star review because it does its job well."
"Ordered this one when crashed previous."
"The hydrometer come in quick and looks well made."
Best Lab Refractometers
This unit is great for the testing of Fruits, Vegetables and Grasses, Wine or Beer makers and for the maintenance of CNC Coolants (Soluble Oils, Semi-Synthetics, Neo-Synthetics and Synthetics) and Water Soluble Drawing & Stamping Compounds. This is THE unit that is used around the world at Boeing, Airbus, Ford Motor Company, Toyota, West Coast Choppers and other manufacturer's big and small!
Reviews
Find Best Price at Amazon"I believe that the higher BRIX food is healthier, and gives you more nutrition for the dollar."
"The refractometer comes with a nice zippered pouch, instruction booklet, small screwdriver for zeroing the unit as well as a small plastic siphon. I tested a store bought apple and discovered it was slightly above average."
"I would say works well for SAP not syrup, you need a refractometer with a higher brix scale for maple syrup, dont want anyone else to make the same mistake i did, but still good to know what your sugar content of the sap is and when the season is over for the noobs. it actually works for syrup if you dilute it in a 2-1 ratio water to syrup, you would be looking for 22-23%. 2 teaspoons of water to 1 teaspoon of maple syrup."
"It works quite well for the price and is the exact same model as the one my professor allows the students to borrow during lab."
"Normally I'd expect to pay over $100 for one of these - so finding a temperature-compensated refractometer for only $35 sounded like a gamble, but one worth taking."
"Yes, a hard case."
"I've been using it on tomatoes and I think it seems to be accurate."
"While I imagine it will do just fine, I chose this model instead of the 0-10% model because this model appeared to come with a plastic case."
Best Lab Refractometers
This unit is great for the testing of Fruits, Vegetables and Grasses, Wine or Beer makers and for the maintenance of CNC Coolants (Soluble Oils, Semi-Synthetics, Neo-Synthetics and Synthetics) and Water Soluble Drawing & Stamping Compounds. This is THE unit that is used around the world at Boeing, Airbus, Ford Motor Company, Toyota, West Coast Choppers and other manufacturer's big and small!
Reviews
Find Best Price at Amazon"I believe that the higher BRIX food is healthier, and gives you more nutrition for the dollar."
"The refractometer comes with a nice zippered pouch, instruction booklet, small screwdriver for zeroing the unit as well as a small plastic siphon. I tested a store bought apple and discovered it was slightly above average."
"I would say works well for SAP not syrup, you need a refractometer with a higher brix scale for maple syrup, dont want anyone else to make the same mistake i did, but still good to know what your sugar content of the sap is and when the season is over for the noobs. it actually works for syrup if you dilute it in a 2-1 ratio water to syrup, you would be looking for 22-23%. 2 teaspoons of water to 1 teaspoon of maple syrup."
"It works quite well for the price and is the exact same model as the one my professor allows the students to borrow during lab."
"Normally I'd expect to pay over $100 for one of these - so finding a temperature-compensated refractometer for only $35 sounded like a gamble, but one worth taking."
"Yes, a hard case."
"I've been using it on tomatoes and I think it seems to be accurate."
"While I imagine it will do just fine, I chose this model instead of the 0-10% model because this model appeared to come with a plastic case."
Best Lab Refractometers
This unit is great for the testing of Fruits, Vegetables and Grasses, Wine or Beer makers and for the maintenance of CNC Coolants (Soluble Oils, Semi-Synthetics, Neo-Synthetics and Synthetics) and Water Soluble Drawing & Stamping Compounds. This is THE unit that is used around the world at Boeing, Airbus, Ford Motor Company, Toyota, West Coast Choppers and other manufacturer's big and small!
Reviews
Find Best Price at Amazon"I believe that the higher BRIX food is healthier, and gives you more nutrition for the dollar."
"The refractometer comes with a nice zippered pouch, instruction booklet, small screwdriver for zeroing the unit as well as a small plastic siphon. I tested a store bought apple and discovered it was slightly above average."
"I would say works well for SAP not syrup, you need a refractometer with a higher brix scale for maple syrup, dont want anyone else to make the same mistake i did, but still good to know what your sugar content of the sap is and when the season is over for the noobs. it actually works for syrup if you dilute it in a 2-1 ratio water to syrup, you would be looking for 22-23%. 2 teaspoons of water to 1 teaspoon of maple syrup."
"It works quite well for the price and is the exact same model as the one my professor allows the students to borrow during lab."
"Normally I'd expect to pay over $100 for one of these - so finding a temperature-compensated refractometer for only $35 sounded like a gamble, but one worth taking."
"Yes, a hard case."
"I've been using it on tomatoes and I think it seems to be accurate."
"While I imagine it will do just fine, I chose this model instead of the 0-10% model because this model appeared to come with a plastic case."
Best Lab Viscometers
NDJ-5S digital LCD viscometer is driven by stepping motor based on 16-bytes microcomputer processor. With blue screen TFL-LCD, it has the features of steady speed, distinctive keystrokes, programming, and alarming system. Rotary speed, temperature, centesimal torsion, serial number of the spindle and maxim viscosity can be measured at present rotary speed of the spindle used. Master control board and subdivision drive plate completely use pastes the piece technique. The circuit is designed by the most advanced microcomputer processor in the world, thus the structure is reasonable and compact.
Reviews
Find Best Price at Amazon"Good product, good finish and above all meets the functions at low cost."
Best Lab Osmometers
Fully automatic, digital osmometer for determination of low concentration of solutes in biological fluids by the freezing point depression method.
Find Best Price at AmazonBest Lab Surface Tension Measuring Devices
Usually the product should take about 6--13 business days to arrive your hand after your payment is confirmed General introduction: The surface tension is basic principle of determining the solubility, wetting, bubbling, coating, permeability and some other properties of a liquid.
Find Best Price at AmazonBest Flowmeters
The Fillrite FR1118A10 is an in-line digital flow meter with a flow rate of 28 gallons per minute. The body shell is made from aluminum, with the measurement chamber polyurethane highly resistant and non deformable.
Reviews
Find Best Price at Amazon"I installed this flow meter on transfer tank being used to fill equipment on our ranch."
"had to play around with it and google it to figure out how to adjust the flow meter to get the right readings for fuel flow."
"When the battery dies you have to throw this meter out it cones with a 2 year warranty if you purchase through an authorized dealer, not amazon."
"it work once then quit working have no paper work to send it back help."
"This fuel meter is junk it must be supposed to be used in indoors only first time it rains the moisture gets under the lens fogs it up and you cannot read shorts the digital stuff out it's junk I'm out returning my second one will not buy another one of these."
"This meter worked for about 2 weeks after I installed it, and has not worked properly since."
"This is for petroleum measuring only, which not only didn't say on the ad when bought it 3 months ago - the ad still doesn't say it even after I complained."
Best Lab Spectroscopy Supplies
Teachers in pre-K, elementary, and secondary classrooms use science education kits and products alongside science, technology, engineering, and math (STEM) curriculum to demonstrate STEM concepts and real-world applications through hands-on activities.
Reviews
Find Best Price at Amazon"On the blue side of the spectrum mine was off 5nm, and in the middle of the spectrum (green) mine was off 3nm in the other direction. I calibrated mine in both the blue and green wavelengths, but don't have good way to calibrate the red end of the spectrum due to lack of a know wavelength source in that range. It takes time and effort to collect meaningful performance data and write a quality review -- If you found this review helpful please vote 'Yes!"
"Also if the light source is not very bright then you might not be able to see the scale since it uses ambient light to make it visible."
"However, it is still useful for what I wanted -- checking the smoothness of the light from LED lamps and CFLs."
"Good for rating light color temps."
"This spectroscope is fun and easy to use."
"Works well, wish gradients were further defined."
"This item is also a useful photography accessory - if you plan on using a light, a quick check of the spectra can give you an idea of how good the colors will be."
"Seeing how different light sources give out light at various parts of the spectrum amazes me."