YSI EcoSense pH1000A

The EcoSense pH1000A benchtop meter is the ideal laboratory instrument for reliable measurements. It is an accurate, easy-to-use solution for the measurement of pH/mV/ORP in the laboratory.

  • Features
  • Specifications
  • Ordering Information

The EcoSense® pH1000A benchtop instrument provides accurate measurements in an affordable format. The instrument features an easy-to-use interface and 1, 2, or 3 point pH calibration. In addition to pH, the pH1000A also measures ORP - Oxidation Reduction Potential (mV) and temperature.

The pH1000A benchtop instrument is an economical, accurate and easy-to-use solution for routine pH or ORP (mV) measurements in the lab. The AUTOLOCK feature holds stable measurements on the display, resulting in precise, repeatable, and error-free measurements. Simple calibration procedures, automatic buffer recognition, and electrode efficiency display makes calibration quick and easy.

Repeatable/Efficient: The instrument's automatic lock mode and end point sensing feature will lock in stable measurements for improved repeatability.

Convenient/Reliable: Simple calibration with automatic buffer recognition and calibration data is stored in memory.

Features of the pH1000A include:

  • Single measurement of pH, ORP (mV) and temperature
  • Large, high-contrast, LCD display; displays pH/mV and temperature simultaneously
  • Simple 1, 2, or 3 point calibration
  • AUTOLOCK mode holds stable readings on the display
  • Accepts U.S. (7.00, 4.01, 10.01) or NIST (6.86, 4.00, 9.18) buffer sets
  • Automatic or manual temperature compensation of all pH measurements
  • Calibration is stored in memory; view electrode efficiency at any time
  • BNC input allows for any pH or ORP electrode with BNC to be connected*
  • Battery or AC power, included with the instrument

EcoSense pH1000A

pH: -2.0 to 16.0 pH units
mV: -1999.9 to 1999.9 mV
Temp: 0.0 to 100°C (32.0 to 212°F)


pH: 0.01 pH units
mV: 0.1 mV
Temp: 0.1°C


pH: ±0.01 pH units
mV: ±0.05% FS ±1 digit
Temp: +0.2°C
System Accuracy (instrument, sensor, cable): 0.2°C +1 LSD

Display: Graphic LCD display, 93 mm wide x 58 mm high
pH Buffer Recognition: US (pH 4.01, 7.00, 10.01) or NIST (pH 4.00, 6.86, 9.18), user selectable
pH Electrode Offset Recognition: ±100 mV at pH 7.00 or +108.3/-91.7 mV at pH 6.86
pH Electrode Slope Recognition: ±30% at pH 4.00, 4.01, 9.18 and 10.01
pH Temperature Compensation:

Automatic/Manual 0.0 to 100°C

Input Impedance: >1012 Ω
Temperature Sensor:

Thermistor, 10 k Ω at 25°C

Operating Temperature Range: From 0 to 50°C
Relative Humidity: up to 90%
Power: 6 x 1.5 Volt AA batteries or the included power supply

590 grams (1.3 lbs) with batteries installed; 450 grams (0.99 lbs) without batteries installed

Dimensions: 155 L x 195 W x 52 H mm (6.10 x 7.68 x 2.05 in)
Certifications: CE, cETLus; electrical protective class III
Warranty: 1 year
Audio Feedback: All touch keys
End Point Sensing & Hold: Yes
Code Description

pH1000A - pH/mV (ORP) lab instrument with power supply


pH electrode with 1 meter cable


pH/ATC (Automatic Temperature Compensation) combination probe with 1 meter cable; features a built-in temperature sensor

601103 Temperature probe with 1 meter cable
601104 pH1000A lab instrument with electrode stand
601105 pH1000A lab instrument with electrode stand and pH electrode
601106 pH1000A lab instrument with pH electrode

Replacement pH1000A power supply*

601113 pH1000A electrode stand

ORP electrode

* Power supply comes with the instrument

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