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Hanna Instruments - HI991301 Portable Waterproof pH/EC/TDS Meter (High Range)
Hanna Instruments - HI991301 Portable Waterproof pH/EC/TDS Meter (High Range) - Image 2
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Hanna Instruments – HI991301 Portable Waterproof pH/EC/TDS Meter (High Range)

The HI991301 from Hanna Instruments is a professional-grade, waterproof portable meter designed to measure pH, EC, TDS, and temperature in high-range solutions. Featuring ultra-precise pH measurement (±0.02 pH, 0.01 resolution), automatic calibration, and a pre-amplified multiparameter HI12883 probe, it delivers accurate readings in both laboratory and field environments. With IP67 protection, selectable EC/TDS conversion factors, and automatic temperature compensation, this meter is ideal for applications requiring higher conductivity and TDS ranges, such as seawater, aquaculture, and industrial water testing.

  • High-Accuracy pH Measurement ±0.02 pH (0.01 Resolution)
  • High-Range EC (0–20.00 mS/cm) & TDS (0–10 ppt)
  • IP67 Waterproof & Rugged Design
  • Pre-Amplified Multiparameter HI12883 Probe with Temperature Sensor

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Description

The HI991301 is designed for users who need reliable high-range water quality measurements. It accurately measures pH (–2.00 to 16.00), EC (0.00–20.00 mS/cm), TDS (0.00–10.00 ppt), and temperature (–5 to 105°C). The meter features automatic one- or two-point pH calibration with standard buffers and automatic EC/TDS calibration at high range points (12.88 mS/cm EC, 6.44 ppt TDS). The pH CAL Check probe diagnostic and sensor check ensure the integrity of your measurements, while selectable β for temperature compensation (0.0–2.4 %/°C) and adjustable EC-to-TDS conversion factor (0.45–1.00) provide flexibility for various water types.

Durability and convenience are built into the design. The pre-amplified HI12883 probe with internal temperature sensor, PVC body, and DIN quick-connect ensures accurate, interference-free readings. The meter features IP67 waterproof protection, user-selectable auto-off, and long battery life (~600 hours with 3 AAA batteries). The kit includes calibration solutions, electrode cleaning solutions, a beaker, batteries, and a rugged thermoformed carrying case, making the HI991301 ready for field and lab testing in demanding conditions where high conductivity and TDS levels are encountered.

Features

  • High-Accuracy pH Measurement – Measures –2.00 to 16.00 pH with 0.01 resolution and ±0.02 pH accuracy.
  • High-Range EC/TDS Measurements – EC 0–20.00 mS/cm, TDS 0–10.00 ppt with selectable EC to TDS conversion factor 0.45–1.00.
  • Pre-Amplified HI12883 Probe – Multiparameter probe with pH, EC/TDS, and temperature sensors in a PVC body with DIN quick-connect.
  • Automatic Temperature Compensation – EC/TDS compensated with selectable β 0.0–2.4 %/°C; temperature displayed in °C or °F.
  • pH CAL Check & Sensor Diagnostics – Ensures probe condition and accurate readings.
  • Waterproof & Rugged Design – IP67 rated to protect meter from immersion and harsh environments.
  • Automatic Calibration – One- or two-point calibration for pH; automatic one-point calibration for EC/TDS.
  • Long Battery Life – Approximately 600 hours of continuous use with 3 AAA batteries; user-selectable auto-off.
  • Complete Kit Included – Calibration solutions, electrode cleaning solutions, beaker, batteries, carrying case, and calibration certificates.
  • Wide Temperature Range – Measures from –5.0 to 105.0°C (23.0 to 221.0°F) for lab and field use.

Specifications

SKU HI991301
Product Name Portable Waterproof pH/EC/TDS Meter (High Range) – HI991301
Quote Required Yes
pH Range – 2.00 to 16.00 pH; – 2.0 to 16.0 pH
pH Resolution 0.01 pH; 0.1 pH
pH Accuracy ± 0.02 pH; ± 0.1 pH
pH Calibration automatic, at one or two points with two sets of standard buffers (pH 4.01 / 7.01 / 10.01 or pH 4.01 / 6.86 / 9.18)
pH Temperature Compensation automatic 0 to 50 °C; 32 to 122 °F
pH CAL Check (electrode diagnostics) probe condition indicator
pH Sensor Check yes
mV Range ± 825 mV (pH‐mV)
mV Resolution 1 mV (pH‐mV)
mV Accuracy ±1 mV (pH‐mV)
EC Range 0.00 to 20.00 mS/cm
EC Resolution 0.01 mS/cm
EC Accuracy ± 2% F.S.
EC Calibration automatic, one-point at 12.88 mS/cm
TDS Range 0.00 to 10.00 ppt (g/L)
TDS Resolution 0.01 ppt (g/L)
TDS Accuracy ± 2% F.S.
TDS Calibration automatic
EC/TDS Temperature Compensation automatic
Temperature Correction Coefficient β selectable from 0.0 to 2.4 %/ °C with 0.1 increments
EC to TDS Conversion Factor selectable from 0.45 to 1.00 with 0.01 increments
Temperature Range ‐ 5.0 to 105.0 °C; 23.0 to 221.0 °F
Temperature Resolution 0.1°C; 0.1°F
Temperature Accuracy ± 0.5°C; ±1°F
pH/EC Probe HI12883 PVC body, pre-amplified multiparameter probe with internal temperature sensor, quick connect DIN connector and 1m cable
Automatic Shut-Off user selectable
Battery Type/Life 1.5V (3) AAA / approximately 600 hours of continuous use
IP Protection IP67
Environment 0 to 50°C (32 to 122°F); RH max 100%
Dimensions 154 x 63 x 30 mm (6.1 x 2.5 x 1.2”)
Weight 196 g (6.91 oz.)
Ordering Information HI991301 is supplied complete with HI12883 pH/EC/temperature probe, pH 4.01 calibration buffer sachet (1), pH 7.01 calibration buffer solution sachet (1), HI70030 12.88 mS/cm calibration solution sachet (1), HI70038 6.44 ppt calibration solution sachet (1), HI700601 electrode cleaning solution sachet (2), 100 mL beaker (1), batteries, calibration certificates for both meter and probe, instruction manual, and rugged thermoformed carrying case.

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