{"id":24094,"date":"2026-09-06T18:56:22","date_gmt":"2026-09-06T16:56:22","guid":{"rendered":"https:\/\/www.plantcaretools.com\/?post_type=product&p=24094"},"modified":"2026-09-06T18:57:25","modified_gmt":"2026-09-06T16:57:25","slug":"10-in-1-soil-tester-npk-ph-ec","status":"publish","type":"product","link":"https:\/\/www.plantcaretools.com\/en\/10-in-1-soil-tester-npk-ph-ec\/","title":{"rendered":"10-in-1 Soil Tester \u2013 NPK, pH, EC, Moisture, Temperature & Light"},"content":{"rendered":"

What is a 10-in-1 soil tester?<\/h2>\n

A 10-in-1 soil tester is a digital instrument that measures ten values of your soil and growing environment with a single probe: nitrogen (N), phosphorus (P), potassium (K), pH, EC, soil moisture, soil temperature, air temperature, humidity and light level. You push the probe into the soil and read the values straight off the LCD screen. No reagents, no soil samples, no colour matching, and no waiting for results.<\/p>\n

That means one meter replaces a shelf full of separate instruments: a pH meter, an EC meter, a moisture meter, a soil thermometer, a light meter and an NPK tester.<\/p>\n

Which ten values does this soil tester measure?<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Value<\/th>\nRange<\/th>\nWhat you use it for<\/th>\n<\/tr>\n<\/thead>\n
Nitrogen (N)<\/td>\n0 \u2013 9.9 mg\/kg<\/td>\nLeaf and shoot growth, green colour<\/td>\n<\/tr>\n
Phosphorus (P)<\/td>\n0 \u2013 9.9 mg\/kg<\/td>\nRoot development, flowering and fruit set<\/td>\n<\/tr>\n
Potassium (K)<\/td>\n0 \u2013 9.9 mg\/kg<\/td>\nWater balance, cell strength, resilience<\/td>\n<\/tr>\n
pH (acidity)<\/td>\n3 \u2013 9 pH (\u00b1 0.1)<\/td>\nDetermines whether nutrients are available<\/td>\n<\/tr>\n
EC (conductivity)<\/td>\n0 \u2013 9.99 mS\/cm<\/td>\nTotal nutrient concentration \/ salt build-up<\/td>\n<\/tr>\n
Soil moisture<\/td>\n0 \u2013 99 %<\/td>\nWhen to water and when to leave it<\/td>\n<\/tr>\n
Soil temperature<\/td>\n0 \u2013 60 \u00b0C<\/td>\nSowing time, root activity, greenhouse growing<\/td>\n<\/tr>\n
Air temperature<\/td>\n0 \u2013 60 \u00b0C<\/td>\nClimate in a greenhouse or indoor space<\/td>\n<\/tr>\n
Humidity<\/td>\n0 \u2013 99 %<\/td>\nFungal pressure and transpiration<\/td>\n<\/tr>\n
Light level<\/td>\nIndication on display<\/td>\nIs the plant getting enough light?<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Why measure NPK, pH and EC together<\/h2>\n

These three values are connected. Soil can hold plenty of nutrients while your plant still shows deficiencies, simply because the pH is off and those nutrients are locked up. Feeding will not help there \u2014 liming or acidifying will. The other way around, a high EC can mean you have already given too much and the salt level is holding the roots back. Only when you see NPK, pH and EC side by side do you know which of the three is actually the problem.<\/p>\n

Nitrogen, phosphorus and potassium (NPK)<\/h3>\n

Nitrogen drives growth and the green colour of the leaves; a shortage shows as yellowing on the oldest leaves. Phosphorus supports the root system and flowering and fruit set; a shortage causes slow growth and sometimes a purple flush across the foliage. Potassium regulates the water balance and strengthens cell walls, making the plant more resilient to heat, drought and disease; a shortage shows as discoloured, scorched leaf margins.<\/p>\n

pH \u2013 the acidity of your soil<\/h3>\n

pH determines which nutrients a plant can actually take up. Most garden and vegetable crops do well between pH 6.0 and 7.0. Rhododendron, azalea, hydrangea and blueberry want it more acidic (pH 4.5 \u2013 5.5), while a lawn performs best around pH 6.0 \u2013 6.5. Always measure before you lime: spreading lime without measuring is the most common mistake in the garden.<\/p>\n

EC \u2013 the nutrient concentration<\/h3>\n

EC (electrical conductivity) measures how many dissolved salts and nutrients are present in the soil. It is the fastest check on over- or under-feeding. If EC climbs in a pot or grow bed, salts are accumulating and the plant starts losing water instead of taking it up \u2014 time to flush.<\/p>\n

Soil moisture, temperature, light and humidity<\/h3>\n

Soil moisture tells you whether watering makes sense, even under a dry top layer. Soil temperature determines when you can sow and when roots become active again. Light and humidity describe the conditions the plant has to cope with \u2014 for houseplants, greenhouses and grow lights that is the missing half of the picture.<\/p>\n

How to use the soil tester<\/h2>\n
    \n
  1. Clear mulch, grass or loose top layer from the measuring spot.<\/li>\n
  2. Lightly moisten very dry soil and wait about 30 minutes; bone-dry soil gives no reliable reading.<\/li>\n
  3. Insert the probe straight and fully into the soil, at least 10 cm deep, down to the root zone.<\/li>\n
  4. Wait until the reading on the display is stable, then note it.<\/li>\n
  5. Measure at three to five spots and take the average \u2014 soil varies a lot per square metre.<\/li>\n
  6. Wipe the probe clean and dry after use. Do not leave the meter in the ground.<\/li>\n<\/ol>\n

    10-in-1 soil tester, 4-in-1 meter or chemical test kit?<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n
    <\/th>\n10-in-1 soil tester<\/th>\nBasic 3\/4-in-1 meter<\/th>\nChemical test kit<\/th>\n<\/tr>\n<\/thead>\n
    Measures NPK<\/td>\nYes, N, P and K separately<\/td>\nNo<\/td>\nYes, as a colour indication<\/td>\n<\/tr>\n
    Measures pH<\/td>\nYes, digital reading<\/td>\nAnalogue needle<\/td>\nColour matching<\/td>\n<\/tr>\n
    Measures EC<\/td>\nYes<\/td>\nNo<\/td>\nNo<\/td>\n<\/tr>\n
    Measures light and humidity<\/td>\nYes<\/td>\nLight sometimes<\/td>\nNo<\/td>\n<\/tr>\n
    Result<\/td>\nInstant, in numbers<\/td>\nInstant, indicative<\/td>\nAfter 10 \u2013 30 min, indicative<\/td>\n<\/tr>\n
    Reusable<\/td>\nUnlimited<\/td>\nUnlimited<\/td>\nLimited number of tests<\/td>\n<\/tr>\n
    Running cost<\/td>\nBatteries only<\/td>\nNone<\/td>\nBuy new tests<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

    In short: a test kit gives you a snapshot in colour, a basic 3-in-1 meter gives you a direction, and this 10-in-1 soil tester gives you numbers you can build a feeding plan on \u2014 and check the results of.<\/p>\n

    Who is this soil tester for?<\/h2>\n
      \n
    • Vegetable and allotment gardens<\/strong> \u2013 know what your soil needs before the season starts.<\/li>\n
    • Lawns<\/strong> \u2013 check pH before liming and track nitrogen through the season.<\/li>\n
    • Ornamentals and borders<\/strong> \u2013 put acid-loving plants in the right spot.<\/li>\n
    • Houseplants and potting soil<\/strong> \u2013 keep an eye on salt and nutrient build-up in pots.<\/li>\n
    • Greenhouses and grow lights<\/strong> \u2013 follow soil and climate with one instrument.<\/li>\n
    • Nurseries, orchards and agriculture<\/strong> \u2013 fast field readings across multiple plots.<\/li>\n<\/ul>\n

      Frequently asked questions<\/h2>\n

      How do I measure the pH of my soil?<\/h3>\n

      Insert the probe at least 10 cm into moist soil, wait until the reading stabilises and read the pH off the display. Measure in several spots and take the average. This meter reads from pH 3 to 9 with an accuracy of 0.1 pH, which is more than enough for any garden, lawn or potting soil situation.<\/p>\n

      Can I test my soil myself without a laboratory?<\/h3>\n

      Yes. A digital soil tester measures NPK, pH, EC and moisture on the spot, without sending a sample away. A lab analysis is more precise and also covers trace elements, but costs time and money per sample. A digital meter can be used as often and in as many places as you like \u2014 which makes it the better tool for finding differences within your own garden and for tracking the effect of feeding.<\/p>\n

      What is a good pH value for my garden?<\/h3>\n

      For most vegetables and border plants pH 6.0 \u2013 7.0 is ideal. A lawn does best around pH 6.0 \u2013 6.5. Acid-loving plants such as hydrangea, rhododendron, azalea and blueberry want pH 4.5 \u2013 5.5. If your pH is too low, raise it with lime; if it is too high, lower it with acidic compost, peat or sulphur.<\/p>\n

      How do you measure NPK in soil?<\/h3>\n

      This soil tester measures nitrogen, phosphorus and potassium separately through the probe and shows a value in mg\/kg for each. You can see immediately which of the three is lagging and choose a targeted fertiliser instead of defaulting to a universal NPK granule.<\/p>\n

      What does the EC value of soil mean?<\/h3>\n

      EC stands for electrical conductivity and indicates how many dissolved nutrient salts are present in the soil. A low EC points to poor, depleted soil. A high EC means a lot of salt is present, often from over-feeding, and the plant will struggle to take up water. EC matters most in potting soil, greenhouse growing and hydroponics.<\/p>\n

      How deep should the probe go?<\/h3>\n

      At least 10 cm, and preferably down into the root zone of the plant you are assessing. Measuring too shallow mainly reads the dry top layer and gives moisture and nutrient values that are too low.<\/p>\n

      How often should I test my soil?<\/h3>\n

      At minimum at the start of the season, before you feed or lime, and again halfway through the growing season to check the effect. In pots, greenhouses and under grow lights it pays to measure monthly, because EC climbs fastest there.<\/p>\n

      Does this soil tester work for houseplants and potting soil?<\/h3>\n

      Yes. The probe is suitable for potting soil, grow beds and open ground. Just make sure the pot is deep enough to insert the probe at least 10 cm, and avoid pushing it straight through the root ball.<\/p>\n

      Do I still need a separate moisture meter or light meter?<\/h3>\n

      No. Soil moisture, light level, air temperature and humidity are all built into this instrument. If you want continuous, remote monitoring rather than manual readings, a wireless sensor with an app is an addition \u2014 not a replacement.<\/p>\n

      Are batteries included?<\/h3>\n

      The meter runs on AAA batteries. Check on delivery whether they are included; shipping rules for batteries mean they are not always supplied as standard.<\/p>\n

      Specifications<\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
      Model<\/th>\nOW-102<\/td>\n<\/tr>\n
      Functions<\/th>\n10 in 1<\/td>\n<\/tr>\n
      pH range<\/th>\n3 \u2013 9 pH, accuracy \u00b1 0.1 pH<\/td>\n<\/tr>\n
      EC range<\/th>\n0 \u2013 9.99 mS\/cm<\/td>\n<\/tr>\n
      Nitrogen (N)<\/th>\n0 \u2013 9.9 mg\/kg<\/td>\n<\/tr>\n
      Phosphorus (P)<\/th>\n0 \u2013 9.9 mg\/kg<\/td>\n<\/tr>\n
      Potassium (K)<\/th>\n0 \u2013 9.9 mg\/kg<\/td>\n<\/tr>\n
      Soil moisture<\/th>\n0 \u2013 99 %<\/td>\n<\/tr>\n
      Soil temperature<\/th>\n0 \u2013 60 \u00b0C<\/td>\n<\/tr>\n
      Air temperature<\/th>\n0 \u2013 60 \u00b0C<\/td>\n<\/tr>\n
      Humidity<\/th>\n0 \u2013 99 %<\/td>\n<\/tr>\n
      Light level<\/th>\nYes, indication on display<\/td>\n<\/tr>\n
      Display<\/th>\nLCD<\/td>\n<\/tr>\n
      Dimensions<\/th>\n309 \u00d7 63 \u00d7 30.5 mm<\/td>\n<\/tr>\n
      Material<\/th>\nPC + ABS<\/td>\n<\/tr>\n
      Power<\/th>\nAAA batteries<\/td>\n<\/tr>\n
      Weight<\/th>\nApprox. 500 g including packaging<\/td>\n<\/tr>\n
      Certification<\/th>\nCE, RoHS, UKCA, IEC 62321<\/td>\n<\/tr>\n
      Warranty<\/th>\n1 year<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

      One digital soil tester that measures ten values.<\/strong> Push the probe into the soil and read everything straight off the LCD: nitrogen (N), phosphorus (P), potassium (K), pH, EC, soil moisture, soil temperature, air temperature, humidity and light level. No reagents, no soil sample, no colour charts \u2014 just numbers.<\/p>\n

      This 10-in-1 meter replaces a separate pH meter, EC meter, moisture meter, soil thermometer, light meter and NPK tester. In a single reading you can see whether the problem is nutrition, acidity or water \u2014 and whether feeding, liming or watering is the right next step.<\/p>\n

        \n
      • Nutrients:<\/strong> N, P and K separately (0 \u2013 9.9 mg\/kg) and EC (0 \u2013 9.99 mS\/cm)<\/li>\n
      • Soil:<\/strong> pH 3 \u2013 9 (\u00b1 0.1), moisture 0 \u2013 99 %, temperature 0 \u2013 60 \u00b0C<\/li>\n
      • Environment:<\/strong> air temperature 0 \u2013 60 \u00b0C, humidity 0 \u2013 99 %, light level<\/li>\n
      • Build:<\/strong> LCD display, 309 mm probe, PC+ABS, AAA batteries<\/li>\n
      • Certification:<\/strong> CE, RoHS, UKCA \u2014 1 year warranty<\/li>\n<\/ul>\n

        Suitable for vegetable gardens, lawns, borders, houseplants and potting soil, greenhouses and grow lights, orchards and agriculture.<\/p>\n","protected":false},"featured_media":24098,"comment_status":"open","ping_status":"closed","template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[113,114,120,123,603,707],"product_tag":[733,613,443,591,353],"class_list":["post-24094","product","type-product","status-publish","has-post-thumbnail","product_cat-measuring-fertilization","product_cat-measuring-instruments","product_cat-new-products","product_cat-plantcaretools-products","product_cat-producten","product_cat-vochtmeters","product_tag-10-in-1","product_tag-bodemvocht","product_tag-ec-en","product_tag-npk-en","product_tag-ph","first","instock","taxable","shipping-taxable","purchasable","product-type-simple"],"acf":[],"yoast_head":"\n10-in-1 Soil Tester \u2013 NPK, pH, EC & Moisture | PlantCareTools<\/title>\n<meta name=\"description\" content=\"Digital 10-in-1 soil tester: measure NPK, pH, EC, soil moisture, temperature, light and humidity with one probe. Instant readings on the LCD display.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.plantcaretools.com\/en\/10-in-1-soil-tester-npk-ph-ec\/\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/www.plantcaretools.com\\\/en\\\/10-in-1-soil-tester-npk-ph-ec\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/www.plantcaretools.com\\\/en\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Products\",\"item\":\"https:\\\/\\\/www.plantcaretools.com\\\/en\\\/products\\\/\"},{\"@type\":\"ListItem\",\"position\":3,\"name\":\"10-in-1 Soil Tester \u2013 NPK, pH, EC, Moisture, Temperature & Light\"}]}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"10-in-1 Soil Tester \u2013 NPK, pH, EC & Moisture | PlantCareTools","description":"Digital 10-in-1 soil tester: measure NPK, pH, EC, soil moisture, temperature, light and humidity with one probe. Instant readings on the LCD display.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/www.plantcaretools.com\/en\/10-in-1-soil-tester-npk-ph-ec\/","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"BreadcrumbList","@id":"https:\/\/www.plantcaretools.com\/en\/10-in-1-soil-tester-npk-ph-ec\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/www.plantcaretools.com\/en\/"},{"@type":"ListItem","position":2,"name":"Products","item":"https:\/\/www.plantcaretools.com\/en\/products\/"},{"@type":"ListItem","position":3,"name":"10-in-1 Soil Tester \u2013 NPK, pH, EC, Moisture, Temperature & Light"}]}]}},"jetpack_sharing_enabled":true,"_links":{"self":[{"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/product\/24094","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/comments?post=24094"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/media\/24098"}],"wp:attachment":[{"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/media?parent=24094"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/product_brand?post=24094"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/product_cat?post=24094"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.plantcaretools.com\/en\/wp-json\/wp\/v2\/product_tag?post=24094"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}