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T: 514-354-2511
T: 1 800 463-4363
F: 514-354-6948
Turbidity and Chlorinometer Environment

Portable Turbidity and Chlorine Meter

Product Code:HI93414

Need more Info? (514) 354-2511 - 1-800-463-4363

The HI93414 measures the most important parameters of drinking water: turbidity and free/total chlorine.

Designed for water quality measurements, HI 93414 provides reliable and accurate readings on low turbidity and chlorine values. The HI 93414 meets and exceeds the requirements of USEPA and Standard Methods both for turbidity and colorimetric measurements.

This instrument incorporates an optical system which guarantees accurate results. The optical system, consisting of a tungsten filament lamp, three detectors (scattered, transmitted for turbidimeter range and one for colorimeter range), and a narrow band interference filter @ 525 nm assures long term stability and minimizes stray light and color interferences. It also compensates for variations in intensity of the lamp, making no need for frequent calibration. The 25 mm round cuvettes made from special optical glass guarantee repeatability and consistency of measurements.

Turbidity measurements can be made in the 0.00 to 1000 NTU (Nephelometric Turbidity Units) range. The instrument has an EPA compliance reading mode which rounds readings to meet EPA reporting requirements. Depending on the measured sample and needed accuracy, normal measurement, continuous measurement or signal averaging measurement can be selected. Free or total chlorine measurements can be made in the 0.00 to 5.00 mg/L (ppm) range.

At startup, the meter displays the percentage of remaining battery life and, if too low, a 'low battery' warning message is displayed.

With the powerful CAL CHECK™ function, performance of the instrument can be validated at any time by using the exclusive HANNA ready-made NIST traceable standards. Calibration can be performed at any time for turbidity and colorimetric range. For turbidity, a two, three or four-point calibration is available using supplied (<0.1, 15, 100 and 750 NTU adjustable calibration points) or user prepared standards. For colorimeter measurements, a one-point calibration can be performed.



  • High accuracy at low ranges
  • Exclusive chlorine CAL CHECK™ calibration validation
  • Exclusive Fast Tracker™ system
  • User replaceable light source
  • Two, three or four point turbidity calibration
  • USB and RS232 PC connectivity
  • GLP features
  • Logging for up to 200 readings
  • User friendly, backlit  display with guidance codes
  • Auto-off
  • Battery % on startup
  • Continuous current time on display



Turbidity of water is an optical property that causes light to be scattered rather than transmitted. The scattering of light that passes through a liquid is primarily caused by suspended solids. Higher turbidity means greater amounts of scattered light. No solution will have zero turbidity because even the molecules in a very pure fluid scatter light to a certain degree. The USEPA Method 180.1 specifies the key parameters for optical systems to measure drinking, saline and surface water turbidity in a 0 to 40 NTU range, using the nephelometric method.
HI 98703 and HI 93414 are designed to meet or exceed the criteria specified by the USEPA Method 180.1 and Standard Method 2130 B. Model HI 93414 is based on a state-of-the-art optical system that guarantees both high performance and reliable results: this optical system includes a tungsten filament lamp, a scattered light detector and a transmitted light detector.

The light beam that passes through a sample is scattered in all directions. The intensity and pattern of the scattered light is affected by many variables like wavelength of the incident light, particle size, shape, refractive index and color. The microprocessor of the instrument performs calculations using the signal that reaches the two detectors to display the NTU value. The optical system and measuring technique allow the compensation of lamp intensity fluctuations, minimizing the need of frequent calibration. The lower detection limit of a turbidimeter is determined by the so called “stray light”. Stray light is the light detected by the sensors that is not caused by light scattering from suspended particles. The optical system of these instruments is designed to have very low stray light, providing accurate results for low turbidity samples every time.


Calibration Validation

When performing chlorine measurements, you need to know that the instrument you are using is right on. With HANNA’s exclusive CAL CHECK™ feature you can now rest assured. Simply insert the factory calibrated standard of a known concentration and verify that your instrument is accurate.
With HANNA’s exclusive CAL CHECK™ validation function users are able to verify the performance of the instrument at any time. Taking just a few short steps, the validation procedure is user friendly and ensures that the meter is properly calibrated. Just use the exclusive HANNA ready-made, NiST traceable standards to verify the performance of the instrument and recalibrate if necessary. All instruments are factory calibrated and the electronic and optical design minimizes the need for frequent calibration.



Turbidity (HI 93414 & HI 98703)
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 Detector 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
Free and Total Chlorine (HI 93414 only)
Range Free Cl2 0.00 to 5.00 mg/L; Total Cl2 0.00 to 5.00 mg/L
Resolution 0.01 mg/L from 0.00 to 3.50 mg/L; 0.10 above 3.50 mg/L
Accuracy ±0.02 mg/L @ 1.00 mg/L
Typical EMC Deviation ±0.02 mg/L
Detector Silicon photocell with 525 nm narrow band interference filters
Method Adaptation of the USEPA Method 330.5 and Standard Method 4500-
Cl G. The reaction between chlorine and DPD reagent causes a pink
tint in the sample
Standards 1 mg/L free chlorine, 1 mg/L total chlorine
Calibration One-point calibration
Common Specifications
Light Source Tungsten filament lamp
Lamp life Greater than 100,000 readings
Display 60 x 90 mm LCD with back light
LOG 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-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.)



HI 710005 Voltage adapter HI 92000 Windows® compatible software
HI 731318 Tissue for wiping cuvets (4 pcs) HI 920005 5 tag holders with tags
HI 731331 Glass cuvets (4 pcs) HI 920011 5 to 9 pin RS232 connection cable
HI 740027P 1.5V AA battery (12 pcs) HI 93703-50 Cuvet cleaning solution (230 mL)


HI 93414 Portable Turbidity and Free/Total Chlorine & HI 98703
portable turbidity meters are supplied with

1 - Five sample cuvets and caps
2 - Three calibration cuvets for turbidimeter
3 - Two calibration cuvets for colorimeter*
4 - Reagent powder packets for free & total chlorine*
5 - Silicone oil
6 - Five tag holders with tags (HI 920005)
7 - Scissors
8 - Batteries (4 pcs.)
9 - AC adapter
10 - Rugged carrying case
Instruction manual
Quick reference guide
Instrument quality certificate

* HI93414 only

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