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EPA Compliant Turbidity Meter


The 98703 portable Turbidity Meter utilizes an EPA compliant tungsten light source and state-of-the-art optical system that allows consistently reliable and accurate measurements for turbidity. Users will appreciate the accuracy and sensitivity of this instrument, particularly at very low turbidity levels.

To meet EPA reporting requirements these instruments have an EPA compliance reading mode. The 98703 meets all EPA requirements with regards to the Standard Methods for Turbidity Measurements. Turbidity is measured up to 1000 NTU. Depending on the measured sample and required accuracy, users can select normal measurement, continuous measurement or signal averaging. The 98703 can be equipped with HANNA's (optional) Tag Identification System (TIS) which allows users to record the time and location of a specific measurement or series of measurements. Logged data can be downloaded to a PC through either USB or RS232 connections. Reliable performance of the instrument is validated using Hanna's exclusive Cal Check® system and our ready-made, NiST traceable chlorine standards. For turbidity, a two, three or four-point calibration is available using pre-set or user defined standards. Frequent Calibration isn't necessary as the system compensates for variations in the intensity of the light source. The instruments' Good Laboratory Practice functions allow traceability of calibration conditions including the time, date and last calibration points. At startup, the meter displays the percentage of remaining battery life. A 'low battery' warning message is also displayed on the LCD to avoid unexpected battery failure. This instruments is equipped with backlighting. The current date and time can be displayed on the LCD.


Range   0.00 to 9.99; 10.0 to 99.9 and 100 to 1000 NTU
Range Selection   Automatic
Resolution   0.01 NTU from 0.00 to 9.99 NTU; 0.1 NTU from 10.0 to 99.9 NTU; 1 NTU from 100 to 1000 NTU
Accuracy   ±2% of reading plus 0.02 NTU
Repeatability   ±1% of reading or 0.02 NTU, whichever is greater
Stray Light   < 0.02 NTU
Typical EMC Deviation   ±0.05 NTU
Light Detection   Silicon Photocell
Method   Ratio Nephelometric Method (90°), ratio of scattered and transmitted light; Adaptation of the USEPA Method 180.1 and Standard Method 2130 B.
Measuring mode   Normal, Average, Continuous
Turbidity Standards   1, 10, 100 and 750 NTU
Calibration   Two, three or four-point calibration
Light Source   Tungsten filament lamp
Lamp life   Greater than 100,000 readings
Display   60 x 90 mm LCD with back light
Logging Memory   200 records
Serial Interface   USB 1.1 or RS 232
Environment   To 50°C (122°F); max 95% RH non-condensing
Power Supply   (4) 1.5V AA alkaline batteries or AC adapter
Auto Shut-off   After 15 minutes of non-use
Dimensions   224 x 87 x 77 mm (8.8 x 3.4 x 3.0”)
Weight   512 g (18 oz.)

  • Model: 9870301
  • Manufactured by: Hanna Instruments

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