Rechargeable Soil NPK Tester with USB C | Yieryi

Size: Set, only soil Nitrogen tester, only soil Phosphorus tester, only soil Potassium tester
SKU: THE01894-NPK
Availability : In Stock Pre order Out of stock
Categories: Shop All Soil and Water Testing Meters Soil pH Meters and Testers
Tags: agronomy tool backlit screen crop nutrition digital soil tester DIY soil test farm equipment field testing fruit tree care garden soil tester greenhouse tool houseplant care lawn soil tester LED display metal probe nitrogen tester orchard management outdoor gardening phosphorus tester potassium tester potted plants precision agriculture professional soil testing raised bed gardening rechargeable meter soil analysis tool soil monitoring soil nutrient detector soil nutrient meter soil sensor tomato growing C charging vegetable garden
$273.98

Size: Set

Set
only soil Nitrogen tester
only soil Phosphorus tester
only soil Potassium tester
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Description

This rechargeable soil nutrient tester reads one main nutrient—nitrogen, phosphorus, or potassium, depending on the version you choose—on a large backlit screen, and charges over USB-C, so there are no disposable batteries to swap. Insert the metal probe about two-thirds into moist soil and read the value in seconds.

Read it as a trend tool. The nutrient figure is a directional reference estimated from conductivity, shown from 0 to 1999 mg/kg—useful for spotting when a nutrient runs low and checking whether feeding worked, not an exact lab number. A fertility chart helps you read whether your soil is lacking, moderate, or rich.

Single nutrient or all three?

Choose the version for the nutrient you adjust most, or use all three for a full profile. Prefer button batteries? See our soil phosphorus and soil potassium testers. To read N, P, and K together in one tool, use the NPK soil tester.

Why Yieryi

Yieryi has built pH, EC, and TDS meters for more than ten years. A handheld nutrient tester is for trends and timing, not lab-grade figures, and we say so plainly.

FAQ

Is the reading lab-accurate?
No—it is a directional estimate for tracking trends and timing feeding, not an exact lab number.

How is it powered?
A built-in battery charges over USB-C from a power bank or adapter—no disposable batteries.

Can I use it in water?
No—it is made for soil only. Keep it out of stones and never immerse the head in water.

Specs

Measures: One nutrient per version: nitrogen (N), phosphorus (P), or potassium (K)
Nutrient range: 0–1999 mg/kg (directional), 1 mg/kg resolution
Display: Large backlit LED, fertility grading chart
Power: Built-in rechargeable battery, Type-C fast charging
Probe: Metal electrode tip, insert about 2/3 into soil
Variants: Sold as a 3-probe set — Nitrogen, Phosphorus, and Potassium probes included together
Dimensions: 250mm length (9.84in); 47 × 47mm display head (1.85 × 1.85in)

Applications

How to use it

  1. Charge over USB-C if needed.
  2. Insert the electrode about two-thirds into moist soil.
  3. Read the nutrient value; compare to the fertility chart and feed if low.

Where it works best
Gardens, raised beds, orchards, and large fields—for growers who want quick nutrient trend checks without disposable batteries. Soil only, not water or hydroponics.

Shipping & Returns

Shipping Policy

  • Orders are processed within 1-2 business days (excluding weekends and holidays).
  • Free shipping is available for the United States, select European countries, and various Asian regions, with a delivery timeframe of 7-20 business days.
  • Duties and taxes are not included and will be collected by the carrier at delivery.
  • Upon shipment, you’ll receive a tracking number via email for real-time updates.

Return Policy

  • We offer a 7-day return policy, starting from the day you receive your item.
  • Items must be unused, in their original condition with tags and packaging, and accompanied by proof of purchase.

Shipping Costs for Returns:

  • Quality Issues: We cover the return shipping costs.
  • Personal Reasons: Customers cover the return shipping costs.

Non-Returnable Items:

  • Used or worn products.
  • Sale/discounted/promotional items.
  • Gift cards.

Refund Process:

  • Refunds will be processed through your original payment method within 5-8 business days after approval.

Nitrogen Tuning for Lush but Stable Leafy Growth

The nitrogen comparison highlights how precise nutrient management turns cabbage and other leafy crops from pale, stunted heads into dense, market-ready produce. With a quick test from the handheld soil nutrient monitor, you can keep N in the “sweet spot,” avoiding soft, pest-prone growth from too much nitrogen and yellowing or slow development from too little—two of the biggest headaches for vegetable gardeners and small-scale growers. For leafy vegetables, an available nitrogen range around 120–150 mg/kg usually delivers strong, dark green leaves while maintaining good structure and shelf life.

Balanced Phosphorus for Deep Roots and Strong Corn Stalks

By reading the value in just a few seconds, you can fine-tune your fertilizer program, avoid wasting money on excess P and protect waterways from runoff—key concerns for today’s sustainable farming and homestead gardens. For most corn fields, the ideal available phosphorus range is 20–30 mg/kg, which supports vigorous root growth and high yields without overloading the soil.

Potassium Control for Heavy, Disease-Resistant Tomatoes

Using this soil nutrient probe, growers can quickly check K levels before feeding, preventing common issues like blossom-end rot, weak skin and poor flavor that come from under- or over-fertilizing. This is especially important as more home growers want farmer-market quality fruit from small spaces and rising fertilizer costs. For tomatoes, the best available potassium level during the fruiting stage is typically 180–220 mg/kg, giving firm, colorful, great-tasting harvests.

Simple Three-Step Operation for Reliable Home Soil Testing

How easy it is to get lab-style data at home: moisten the bed, push the probe about two-thirds into the ground, read the digital value, then wipe the tip clean.

Bright Display and Fast-Charge Probe for On-the-Go Soil Checks

This visual highlights how the large backlit LED screen, USB-C fast charging and sharp metal tip turn the tester into a truly portable smart gardening tool for busy growers. Even at dusk or in the greenhouse, you can plug into a power bank, jab the precision probe into the soil and read nutrient values at a glance—no more waiting for lab reports or squinting at tiny analog meters.

FAQ

Can I use it in water, hydroponics or very sandy/rocky soil?

No. This meter is designed only for classic garden and field soil. It should not be used in water, hydroponic systems, very sandy soil full of stones, or media with a lot of powder or sawdust, as this can damage the electrode or affect readings.

Does it need batteries?

No separate batteries are required. The tester has a built-in rechargeable battery and a Type-C USB port. Just connect it to a USB charger or power bank for fast, convenient charging.

How often should I test my soil?

For most gardens, testing once before planting and then every 4–6 weeks during the growing season is enough. Intensive production (greenhouses, market gardens) may benefit from more frequent checks, especially after heavy rain or fertilizer applications.

Can beginners use this, or is it only for professionals?

Do not force it into stones or hard rocks. After each test, wipe the metal tip with a soft cloth and keep it dry. Avoid leaving the probe in soil for long periods and never immerse the head in water.

What’s the difference between the N, P and K versions?

Each version is optimized to measure one main nutrient—Nitrogen, Phosphorus or Potassium. You can buy a single meter for the nutrient you adjust most often, or use all three to get a complete NPK profile of your soil.

High Accuracy Readings

Ensure precise and consistent pH measurements for reliable results in every application, from water testing to agriculture.

Durable & Reliable Design

Built with high-quality materials, our pH meters are designed to withstand rigorous use, offering long-lasting performance you can trust.

User-Friendly Interface

Featuring intuitive controls and a clear display, our pH meters make testing effortless, even for beginners.

Superior Quality

Certified products with high precision, rigorously tested for reliability.

Global Reach

Trusted by clients across Europe, America, Asia, and the Middle East.

Innovative R&D

Cutting-edge products developed through continuous research and unique patents.

Customer-Centric Service

Tailored support with fast, efficient global delivery.