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Hanna Instruments Canada
Customer Support: (800) 842-6629

Pool Line pH 4.01 Buffer Sachets (25 x 20 mL) - HI700044P


SKU: HI700044P Categories , ,

In stock

HI700044P Pool Line pH 4.01 buffer sachets are a premium quality buffer used to calibrate pH meters used to measure the water quality of swimming pools and spas. The solution is packaged in a convenient disposable packet and is ideal for users that perform infrequent calibrations. Each time a packet is opened it is as fresh as the day it was produced.

  • 25 sachets of buffer with 20 mL of solution
  • Accuracy of ±0.02 pH @ 25℃
  • 5 year shelf life for unopened sachets


HI700044P is a high-quality pH 4.01 calibration buffer produced in accordance with ISO 3696/BS3978 standards using high purity salts, deionized water, certified weight-checked balances, and Class A glassware in a temperature-controlled environment monitored with certified thermometers. Reported values are accurate to ±0.02 pH @ 25℃ and are traceable to NIST Standard Reference Materials (SRMs).

Convenience of individual packaging

  • Ideal for users that do not calibrate frequently
  • Every pH buffer sachet is as fresh as the day it was packaged
  • Light block packaging prevents oxidation from UV light that could alter the buffer value

Each sachet marked with lot number and expiration date.

  • Hanna buffers are specially formulated to have an expiration of 5 years from manufacture for an unopened sachet.

Additional information

Weight 0.45 kg


pH Accuracy

±0.02 pH


SKU HI700044P
Name Pool Line pH 4.01 Buffer Sachets (25 x 20 mL) – HI700044P
Description calibration buffer
pH Accuracy ±0.02 pH
pH Value @ 25°C 4.01
Package sachets
Quantity 25
Size 20 mL


Pool Line pH 4.01 Buffer Sachets (25 x 20 mL) – HI700044P