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Apera Instruments GroStar Series GS1-P pH/ORP Pen Tester Kit with Replaceable Double-Junction pH Probe and ORP Probe for Hydroponics Water Quality Testing, Gen II
✅ In stock
📉 Price recently dropped
B
Grade
Analysis Confidence
100%
🏷️ Price includes Coupon savings
⚠️ Price may have changed. Last updated 24+ hours ago — confirm on Amazon.
Check Deal at Amazon
Price verified Sep 19, 2026 7:21 AM · Prices & availability subject to change
Is This a Good Price on Amazon?
👍 Good Deal- 👍Verdict: Good Deal. Solid value. Price is noticeably below the recent average.
- 💰At 11% off its standard going rate, this offer delivers clear value for the money.
- 📉No lower price has surfaced in the past twelve months, making this one of the standout deals in recent memory.
- 📈The direction is downward at the moment; if that holds, an even better price may surface — though timing the market is never certain.
How We Scored This Deal
Price Competitiveness
12.48/28
Recent Value
5.16/22
Market Standing
17.1/20
Deal Strength
16/20
Momentum
10/10
📝 Product Overview
🏪 Sold by
Amazon.com
🚚 Shipping
Free Shipping
Product Details
✓Lab-grade instrument designed specifically to meet growers' needs and habits
✓Measures pH, ORP (redox), and temperature with premium probe technologies, ensuring high accuracy and durability with minimal maintenance
✓Grower-friendly calibration workflow on an HD backlit screen allows you to finish 2-point calibration within a minute
✓Replaceable double-junction pH and ORP probe helps you save money in the long run
✓Electrode condition indicator and calibration reminder function help you perform proper maintenance in a breeze
⚙️ Specifications
Range
0 to 14.0 pH; -1000 to 1000 mV; 0 to 50˚C (32 to 122˚F)
Resolution
0.1 pH; 1 mV; 0.1˚C/0.1˚F
Accuracy
±0.1 pH; ±2 mV; ±1˚C/±1˚F
Temperature Compensation
Automatic 0 to 50˚C (32 to 122˚F)
Calibration
pH: Automatic 1 to 3 points (4/7/10)
Unit
pH, mV, ˚C, ˚F
Product Dimensions
8.6 x 1.5 x 1.3 inches
Item Weight
15.1 ounces
Manufacturer
Apera Instruments
ASIN
B0BVSXGZQV
Date First Available
February 15, 2023
