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  • Luster Leaf 1840 Rapitest Soil pH Meter  (Older Model)
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Luster Leaf 1840 Rapitest Soil pH Meter (Older Model)

167 customer reviews

List Price: $21.99
Price: $14.54 & FREE Shipping on orders over $35. Details
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  • Automatically measures soil pH
  • No chemicals or litmus paper required
  • Information included for how to test
  • Product specifically designed to be used only in soil
  • No batteries required
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$14.54 & FREE Shipping on orders over $35. Details In Stock. Ships from and sold by Amazon.com. Gift-wrap available.

Frequently Bought Together

Luster Leaf 1840 Rapitest Soil pH Meter  (Older Model) + Luster Leaf 1820 Rapitest Soil Moisture Meter + Luster Leaf 1601 Rapitest Soil Test Kit
Price for all three: $39.58

Buy the selected items together


Product Description

Item Package Quantity: 1

Product Description

Test soil pH to ensure your plants are in the proper soil to provide ideal growth. This meter with tethered stainless steel probe provides instant readings of soils acidity or alkalinity. No chemicals or litmus paper required. Information included for how to test, balance and control soil pH levels. No batteries required for operation.

From the Manufacturer

Luster Leaf 1840 Rapitest Soil pH Meter

Product Details

Item Package Quantity: 1
  • Product Dimensions: 2 x 5.3 x 11.5 inches ; 4.8 ounces
  • Shipping Weight: 4.8 ounces (View shipping rates and policies)
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item can be shipped to select countries outside of the U.S. Learn More
  • ASIN: B0000DI848
  • Item model number: 1840
  • Average Customer Review: 3.1 out of 5 stars  See all reviews (167 customer reviews)
  • Amazon Best Sellers Rank: #7,959 in Patio, Lawn & Garden (See Top 100 in Patio, Lawn & Garden)

Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

148 of 151 people found the following review helpful By Eric Spry on June 25, 2009
Item Package Quantity: 1
I bought one of these meters in 1987 (obviously not from here!) and am still using it today. I've had the same 'problem' other people have reported about the meter staying at 7, but it's easy to solve.
I use a small piece of 600 grit sandpaper to polish the probe prior to use. The readings are accurate every time. Just make sure the probe is bright and shiny (especially the tip), and it will work. If it's not shiny, the readings will be sporadic, or it will just get stuck on a particular reading. It's a very simple and affordable PH meter, that can obviously last a very long time!
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208 of 218 people found the following review helpful By N.C. on January 7, 2009
Item Package Quantity: 1
I purchased this meter about 2yrs. ago and it works fine. I think what the other neg. reviewers are failing to do even on brand new meters is to keep the probe clean, not just visually clean. These work off a chemical and electrical reaction if the probe has any oxidation which starts the minute after you clean the probe it varies or even blocks the electron flow, distorting or even blocking the reading entirely. With mine before I go to use it I pinch a peice of steel wool in my fingers and run it back and forth a couple times than wipe it clean. Do this and you'll find very acurate and subtle changes in readings. You also don't need to do all the soil prep as one reviewer said. Just collect and test watering run off from potted plants. If you want to test straight soil, yes the soil must be moist and you'll learn to make the slight needed adjustments in readings with practice, no big deal. Keep in mind salt water conducts electricity better than fresh, it's nearly the same principle as to why the directions what you to test mixed and dissolved soil. I did this once for acuracy and than acounted for the diffrence when I test straight into the potted soil with no prep. Do wipe probes inbetween test and maintain consistent probe depth. (Duh the more metal that's in contact with the test medium soil/water the greater the flow of electrons will be and to the meter, effecting it.) I test my watering solutions and it is acurate enough that if the water is wavey hitting the probe at different hights the meter reads these subtle diffrences. In short great product especially under $15, you just have to be smarter than the meter.
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40 of 40 people found the following review helpful By Marc Nuss on September 4, 2011
Item Package Quantity: 1 Verified Purchase
read many reviews online and ended up going with this brand and model. i amend my soil as most hobbiest to serious gardners do, i wanted to have a quick reference for hot spots (too acid or alkaline), when i notice a problem area or bald spot in my garden as to have a pH reference point. i have tested this against litmus paper and add soil to solution type tests and results very, very similar. i am not trying to be an agricultural chemist and for the money, this tool has been very helpful to me in my home vegetable gardening endeavors. i make sure and keep the tip clean and follow directions (not for liquids) and it has served me well. when stored in a ziploc, the indicator stays at a neutral 7 which is what i expect from it. i recommend testing on damp to dry soil as too much water will affect your readings. i reserve the upgrade to 5 stars until it makes it through the warranty period then i will update. i had a few areas in my garden that were struggling or no germination/poor growth and this little jewel showed me that a 5 pH existed. i amended to correct, indicator showed 6.5 and i now have no problems with these areas. i literally grow asparagus - zucchini and my yields are good enough to feed my wife and i, can some, and give some away to the neighbors with just a small home garden. i encourage everyone to get on board with grow your own.

7/18/12 Well gardners, still working like a charm and thanks to some fortunate rain this year, yields have been good enough to give to our neighbors and we are canning now...will turn over to fall stuff soon...pH meter helped me again this year when i had problem with one of my large potted gardens which revealed a 7.8 pH which is much higher than usual and i composted well in those large pots and it was enough to correct.
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46 of 48 people found the following review helpful By Michele on May 8, 2009
Item Package Quantity: 1 Verified Purchase
This product works great. I was reluctant to buy it because others said it just keeps showing 7, but if you follow instructions and make sure the soil is wet, it works perfect. Be careful not to stick it in dirt that has a lot of rocks or you will scratch it.
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35 of 37 people found the following review helpful By Chuck2 on October 2, 2010
Item Package Quantity: 1 Verified Purchase
The tester worked good after I found the best way to use it. I got readings of 5.6 to 6.8 around different plants (mostly azaleas). What worked best for me was to clear a small 4 to 6" area of exposed soil. The soil needs to be damp down 4-5". I pressed the area down so it was firm. I then pressed the probe in all the way to the black frame (4-5") and then turned it some per directions. The probe should go in smoothly without hitting anything (stones) and it should feel tight - like the soil is firmly around the probe. It may take a minute for the needle to settle out. You can do 2 to 3 probes at adjacent locations. You need to clean the probe with the supplied little pad like the directions say when you go to a new plant/location.
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32 of 35 people found the following review helpful By Consumer on May 9, 2011
Item Package Quantity: 1 Verified Purchase
Well, I read all the reviews and bought anyways figuring people just didn't know how to follow instructions or how to properly clean the probe.

I tried damp soil, soil test while raining outside, soil mixed with distilled water... always a 7. I used the provided cleaning pad and cleaned vigorously, yet still careful to avoid the tip. I used the probe gently and everything stayed intact. Yet the meter only ever read 7.

Finally I tried cleaning it again, then sticking it into orange juice (documented pH of 4 +- 0.5). The needle moved very slightly to about 6.8 over the course of 30 seconds, then stayed there. The metal part remains smooth and shiny.

Seeing as how the instructions only say to "gently" clean the metal part, and how returning was looking like a better option, I didn't try the sandpaper approach.

THEN: I gave it one last try with some steel wool... and behold... IT WORKS! The provided cleaning pad is GARBAGE! You need something more abrasive. I still need to test the accuracy however.
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Luster Leaf 1840 Rapitest Soil pH Meter  (Older Model)
This item: Luster Leaf 1840 Rapitest Soil pH Meter (Older Model)
Price: $14.54
Ships from and sold by Amazon.com