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Hanna Instruments – HI8734 Three Range Portable TDS Meter

The HI8734 Three Range Portable TDS Meter is a compact, versatile meter designed for accurate TDS measurement across low, medium, and high ranges. It features manual one-point calibration, a fixed TDS factor of 0.5, and manual temperature compensation with a β coefficient of 2%/°C. Equipped with the HI76301D four-ring conductivity probe, it can measure TDS, EC, and temperature reliably with a single sensor. Its PVC probe sleeve protects the sensor during outdoor measurements, and the device is suitable for a wide range of laboratory and field applications.

  • Three TDS ranges: 0–199.9 mg/L, 0–1999 mg/L, 0.00–19.99 g/L
  • Manual one-point calibration via TDS knob
  • HI76301D four-ring probe with protective PVC sleeve
  • Manual temperature compensation (β = 2%/°C)

Description

The HI8734 is engineered for portable, low-to-high range TDS measurement. Users can manually calibrate it in a standard TDS solution at a single point using the TDS knob, ensuring simple and reliable setup. The device includes three range options to quickly adapt to different sample concentrations, with built-in alerts to indicate if a reading is outside the selected range. With a fixed TDS factor of 0.5, 1 S/cm of conductivity corresponds to 0.5 mg/L (ppm) of TDS.

The supplied HI76301D four-ring conductivity probe features a DIN connector and 1 m cable, allowing a single sensor to measure multiple parameters. The probe also includes a PVC protective sleeve, enhancing durability for outdoor or field use. The meter provides manual temperature compensation from 0 to 50°C, adjusting the sample reading by 2% per degree Celsius. With a compact form factor, 9V battery operation (approx. 100 hours), and a rugged design, the HI8734 is ideal for portable, accurate TDS monitoring.

Features

  • manually calibrated in a standard TDS solution at one specific location
  • To quickly alter range, there are three specialized buttons.
  • If a reading is outside of range, the meter will notify that a new range should be chosen.
  • Given that the HI8734 has a fixed TDS factor of 0.5, 1 S/cm corresponds to 0.5 mg/L (ppm) of TDS.
  • The sample temperature is adjusted by 2% for every degree Celsius shift using the temperature compensation coefficient, which is set at 2%/°C.
  • With just one sensor, the HI76301D four-ring probe that comes with the meter can measure a variety of things.
  • When conducting measurements outside, the probe’s protective PVC sleeve ensures longevity.

 

Specifications

SKU HI8734
Product Name Three Range Portable TDS Meter – HI8734
Quote Required Yes
TDS Range 0.0 to 199.9 mg/L (ppm); 0 to 1999 mg/L (ppm); 0.00 to 19.99 g/L (ppt)
TDS Resolution 0.1 mg/L (ppm); 1 mg/L (ppm); 0.01 g/L (ppt)
TDS Accuracy ±1% FS (excluding probe error)
TDS Calibration manual, one-point through TDS knob
EC/TDS Temperature Compensation manual from 0 to 50°C (32 to 122°F) with β = 2%/°C
EC to TDS Conversion Factor 0.5
EC/TDS Probe HI76301D four ring conductivity probe with DIN connector and 1 m (3.3’) cable (included)
Battery Type/Life 9V / approximately 100 hours of continuous use
Environment 0 to 50°C (32 to 122°F); RH max 95%
Dimensions 145 x 80 x 36 mm (5.7 x 3.1 x 1.4”)
Weight 230 g (8.1 oz)
Ordering Information HI8734 is supplied with HI76301D conductivity probe, HI70032 1382 mg/L (ppm) calibration solution sachet, battery, and instruction manual.

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