420 Sale | 2026 Spider Farmer® 5-in-1 pH Hydroponic Meter Kit
$49.99 Original price was: $49.99.$39.99Current price is: $39.99.
420 Price Guarantee
Designed for hydroponics and plant growth, it accurately measures pH, EC, TDS, temperature, and salinity to ensure optimal nutrient uptake.
- 5 in 1 Accurate Measurements
Designed for hydroponics, it accurately measures pH, EC, TDS, temperature, and salinity to ensure optimal nutrient uptake.
- High-Sensitivity Sensor
With a high-sensitivity electrode sensor, it provides stable readings with ±0.05 pH accuracy, preventing nutrient issues and fertilizer waste.
- TDS & pH on one screen
TDS & pH on one screen—clear at a glance for faster, more precise nutrient management.
- Waterproof & Dustproof Design
Specially sealed for water, dust, and moisture resistance, ensuring reliable performance in hydroponics.
- Long-lasting Battery
Built-in 600mAh lithium battery supports 300 cycles, with up to 6 months standby on one charge.
Package Includes:
- 5-in-1 Hydroponic Tester x 1
- Type-C Cable (60cm) x 1
- 4.00 Calibration Powder x 1
- 6.86 Calibration Powder x 1
- 9.18 Calibration Powder x 1
- User Manual x 1 → Click here to view the online manual
Fast Shipping
Same day delivery, 3-8 business days for the product to reach you.
After-Sale Service
Up to 5 years warranty. Best customer service.
The Cyber Monday sale will end on December 8nd.
Fit Guide
SF SERIES
| SF Tent Size | # of SF1000 | # of SF2000 | # of SF4000 | # of SF7000 | SF FAN COMBO |
| 2’x2’ | 1 | / | / | / | 4 inch |
| 3'x3' | 1 | 1 | / | / | 4 inch |
| 4.5'x2' | 2 | 1 | / | / | 4 inch |
| 4'x4' | 4 | 2 | 1 | / | 6 inch |
| 5'x5' | 6 | 3 | 1 | 1 | 6 inch |
| SF Tent Size | # of SE3000 | # of SE5000 | # of SE7000 | # of SE7000-730w | SF FAN COMBO |
| 2’x2’ | 1 | / | / | / | 4 inch |
| 3'x3' | 1 | 1 | / | / | 4 inch |
| 4'x4' | 1 | 1 | / | / | 6 inch |
| 5'x5' | 2 | 1 | 1 | 1 | 6 inch |
Q & A
Hello customer, only the probe part can be immersed in water.
chiara7551093 answered on April 8, 2026 store managerDear customer, we regret to inform you that replacement cameras are not currently available for sale on our website. We are working on them and expect to launch them next quarter.
chiara7551093 answered on November 14, 2025 store managerDear customer, yes, you can air dry and store it. However, we recommend soaking it in pure water for 3-5 minutes before each use.
chiara7551093 answered on November 6, 2025 store managerUnfortunately, it cannot be uploaded to the app yet.
chiara7551093 answered on October 27, 2025 store managerSorry, no questions were found
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1. Customer Satisfaction and Quality Products
Spider Farmer is a reputable brand in indoor and hydroponic gardening. Its products are widely used by farmers, hobbyists, and professionals. The company's mission is to help people grow healthy and vibrant plants in any environment. Spider Farmer continuously works to enhance and expand its product range to meet the evolving needs of its customers.
2. Best Prices Guarantee
Spider Farmer is committed to providing the best prices online for all our products. When you shop with us, rest assured that you are receiving the best online prices.
3.Enjoy Free and Discreet Shipping Across the USA
Our company is pleased to provide complimentary shipping to nearly every state in the USA, utilizing trusted couriers such as FedEx, UPS, USPS, and other reliable shipping providers. We understand the importance of privacy and will ensure that your package arrives discreetly.
4. Commitment to Customer Care
At Spider Farmer, we take responsibility for ensuring that our customers are always satisfied with their purchase. If anything is wrong, we guarantee to make it right, and you can reach us via call, email or message, and we will respond in about 1 business day or less.
5.Hassle-Free Returns and Refunds
In case your purchase does not meet your standards, we offer a hassle-free 30-day refund and return policy. Refer to our full return policy for details.
6.Dependable Global Shipping
We offer international shipping for all our products via FedEx, UPS, USPS, DHL, and other reputable couriers. To obtain a shipping quote, please proceed to the checkout process or get in touch with our customer service team for further assistance.
7. Buy Now, Pay Later with PayPal
Time and flexibility are on your side. Get what you want and break the payments up over weeks or even months.
8. Secure Payment Methods
We accept major credit and debit cards, PayPal, and bank transfers, and all card payments are processed through our encrypted SSL security processing system, ensuring that your identity is always protected.
Spider Farmer is dedicated to providing high-quality products and exceptional customer service to ensure a happy growing experience for all our customers.
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Why Choose Our Compressor Dehumidifier Over Cheaper Options?
You may find dehumidifiers on the market priced at just a few dozen dollars, but most of those use semiconductor technology. Semiconductor dehumidifiers work by cooling air with a thermoelectric effect, but they are far less effective, especially in colder weather. Our dehumidifier uses a high-quality compressor, which comes at a higher cost but delivers far superior performance.
Why a Compressor Dehumidifier?
Semiconductor dehumidifiers simply can’t get the job done—especially in winter, as they struggle to operate efficiently in low temperatures. In contrast, compressor dehumidifiers are widely used in commercial settings for their effectiveness. In fact, our unit removes moisture up to 39 times faster than semiconductor models. That means faster results and lower energy consumption, saving you both time and money on electricity bills.
How Does It Work?
Our dehumidifier pulls in humid air, removes the moisture, and then releases the dry air back into your tent or space. The collected moisture can either be stored in the built-in water tank or drained continuously using the included hose. According to our tests, it may increase the temperature inside your tent by 2-4℉ (around 1-2°℃), a small trade-off for such efficient moisture removal.
User-Centered Design for Tents
We understand our users’ needs, which is why this dehumidifier is specifically designed for tent environments. The dry air outlet pipe is tailored to fit seamlessly with tents, ensuring optimal airflow. It’s perfect for 2×2 ft (60×60 cm), 2×4 ft (60×120 cm), 2.3×4.6 ft (70×140 cm), 3×3 ft (90×90 cm), 4×4 ft (120×120 cm), and 5×5 ft (150×150 cm) tents. Whether you’re using a small or large tent, our dehumidifier adapts effortlessly to create the ideal environment.
User-Friendly Features
For added convenience, our dehumidifier comes with a power outage memory function. If the power goes out, it will remember its previous settings, ensuring a smooth restart. The dehumidifier retains these settings and will automatically turn back on when power is restored—no manual restart needed.
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