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Traceable 4277 pH/ORP Meter

Model: 4277 | Order No: 4277/B

This water tester measures both pH and ORP. It has protective IP67-rated housing to guard against water and dust.

Your Price $348.00 USD
Availability 1 to 2 Weeks

Traceable 4277 Offers

The Traceable 4277 pH/ORP Meter makes it easy to monitor water quality. It tests for both pH and ORP using convenient single-handed operation. It's also durably constructed and can store up to 25 data points at a time, so that you can look back and review the water content as you go. NIST-traceable calibration.


  • Measures the oxidation-reduction potential (ORP) and pH level of water
  • Stores up to 25 data points with date/time stamps
  • IP67-rated housing is protected against dust and moisture
  • Single-handed operation
  • NIST-traceable calibration offers reliable accuracy

Traceable 4277 Specifications

pH Range 0.00 to 14.00 pH units
pH Resolution 0.01 pH units
pH Accuracy ±0.02 pH units
ORP Range -1800 to 1800 mV
ORP Resolution 0.1mV < 1000mV (1mV ≥1000mV)
ORP Accuracy ±20 mV
Probe Temperature Range 32 to 140 °F (0 to 60°C) selectable
Temperature Resolution 0.1° (1° when >100°)
Temperature Accuracy ±1°C
Standard Electrode Polycarbonate body housing, 12mm diameter, 4.4”/111mm length, single-junction gelled Ag/AgCl reference (sealed) with ceramic pin/pellon junction, ASI type VIII glass, full range pH sensor, 0.095” Platinum disc ORP sensor, and integral thermistor. Also Inc
Operating Range 32 to 140°F (0 to 60°C)
Power Requirements 2 x CR2032 3V Batteries (included)
Battery Life >25 Hours Typical (without use of back-lighting)
Battery Saver Feat After 8 minutes of non-use, low battery indicator at < 10% remaining
Dimensions 10.25 x 2.5 x 1" (26 x 6.4 x 2.5 cm)
Weight 4.5 ounces (127 grams)
Calibration User-selected 1, 2 or 3-point calibration
Automatic Buffer Recognition User-selected standard buffer sets: USA 4.01 / 7.00 / 10.01 or NIST 4.01 / 6.86 / 9.18
Click here for complete specifications on the Traceable 4277

What's included with the Traceable 4277

  • Meter
  • Traceable® Certificate
  • CRM pH Buffers
  • Carrying Case
  • Batteries
  • User Guide
Waring Laboratory Equipment Supplies

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Customer Reviews for the Traceable 4277