15pcs PH 4.01 PH Meter Calibration Solution Powder PH Calibration Powder Packets For PH Tester

Label:Yes [Safe Formula] Contains no BPA and no other harmful chemicals, making it a safer choice for regular pH calibration. [Wide Application] Suitable for testing the pH balance of drinking water, aquariums, swimming pools, spas, or hydroponic systems. [Easy to Use] Mix the buffer powder with 250 mL distilled water, place the pH meter into the solution, stir gently, and wait a few seconds to get a stable reading. [Accurate and Long Lasting] The buffer accuracy at 25 degrees Celsius is within plus or minus 0.01 pH units, and it remains stable over time. Each pack is sealed in durable packaging that helps avoid dampness, keeping the powder fresh until use.

[Complete Package] Includes 15 packets of pH calibration powder: 5 packs of pH 4.01 solution powder, 5 packs of pH 6.86 solution powder, and 5 packs of pH 9.18 solution powder, covering common pH calibration needs with flexibility.

Specifications: Accuracy: ±0.01PH at 25°C PH buffer powder: 4.01, 6.86, 9.18 4.01: Often used under acidic conditions, 4.01 standard solution should be calibrated 6.86: Often used under neutral conditions, 6.86 standard solution should be calibrated 9.18: Often used under conditions, 9.18 standard solution should be calibrated Item weight: 2.7g / 0.1ounce Material:High purity pH buffer salts Color: Multicolor Package size: 70 * 60 * 10mm(2.76 * 2.36 * 0.39in)

Package weight: 46g / 1.6ounce

Directions for Use: Step 1: Open the packet pour the powder into a cleaning dried cup. Step 2: Add 250ml deionized water (or distilled water) to the cup. (or a 250 ml calibrated flask) Step 3: Stir until the powder has completely dissolved. Step 4: Calibrate your PH meter. (rinse the meter by pure water before test)

Notes: 1.To ensure more accurate , calibrate by 2 solution, first use 6.86, then 4.01 or 9.18. 2.Cup should be or ceramic, don't use metal material. 3.You can store the calibration solution in covered jars or cup for 2-3 weeks. (In the refrigerated condition)

Packing List: Set B: 5 * 4.01 PH Buffer Powder 5 * 6.86 PH Buffer Powder 5 * 9.18 PH Buffer Powder Note: 1. Due to the difference between the monitors and light effect, the picture may not reflect the actual color of the item. 2. Please allow small deviation due to manual measurement. Thanks for your understanding.