Waterproof pH Meters

Model #8680/8681/8682

Auto-Temp Compensation (8681 & 8682 only)
One-Touch Auto-Calibration
Up to 3 point cal 4,7,10
Cal values adjustable
Data Hold Function
Auto Power-Off
°C/°F Switchable (8681 & 8682 only)

Limited Time Special on 8680:
Now $29 Normally $39




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These convenient and portable pen-style pH meters are designed for fast and accurate pH measurements in any environment. Choose from three models to fit your application. Each unit includes a one-touch calibration feature at 3 points and a waterproof rating to IP65. They fit comfortably in your hand and conveniently store away in your shirt pocket.

8680—Simple to use and waterproof. Includes data hold, one-touch auto-calibration at 4, 7, and 10 pH, and auto power-off.

8681—Choose this model for professional performance, durability and a great price. Auto temperature compensation ensures good accuracy. Dual display shows temperature and pH at the same time with accuracy to ±0.2pH.

8682—Easily your best value in a pocket-sized, waterproof pH pen with high precision. Auto temperature compensation with excellent accuracy. Dual display shows temperature and pH at the same time with accuracy to ±0.05pH.

Range 8680: 2.0 to 12.0 pH
8681: 0 to 14 pH
8682: 2.0 to 12.0 pH
Accuracy 8680: ±0.3pH
8681: ±0.2pH; ±1.8°F (±1°C)
8682: ±0.05pH; ±0.9°F (±0.5°C)
Resolution 8680: 0.1pH
8681: 0.1pH; 0.5°F, 0.5°C
8682: 0.1pH; 0.1°F, 0.1°C
Auto Temperature Compensation 32 to 122°F (0 to 50°C)
Water Resistance IP65
Environmental Range 32 to 122°F (0 to 50°C), 0 to 80% RH
Battery Button Cell LR44 x 4
Dimensions 1.42" x 6.3" x 0.89"
Ph Buffers

pH Buffers

Model: Various

  • Standardized reference solution
  • 20ml or 500ml sizes
  • Purchase individually or in assorted packs
Standardized NIST-Certified pH references within 0.01pH @ 77°F (25°C). Freshness dated and labeled. Can be bought in 20ml or 500ml bottles or in assorted packs. More Info



Zip Wallet

Protective Zipper Wallet

Model: 830-001

  • Vinyl pouch with zip closure
  • Light padding for storage
  • Carrying loop
Padded vinyl pouch with zip closure. Stores Thermapen nicely (with or without silicone boot) with light interior padding. Great value!


LR44 Batteries

Model: LR44

  • LR44 batteries x 2
  • 1.5V
Package of 2 batteries. Standard LR44 size.

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