EPA Compliant Turbidity & Chlorine Meter
The HI 98703 and HI 93414 utilize an EPA compliant tungsten light source and state-of-the-art optical system that allow consistently reliable and accurate measurements of turbidity and free/total chlorine. Users will appreciate this accuracy particularly at very low turbidity levels. HI 93414 meets the requirements of EPA and Standard Methods for Turbidity and Colorimetric Chlorine Measurements.
Turbidity is measured up to 1000 NTU and free or total chlorine measurements can be made in the 0.00 to 5.00 mg/L (ppm) range. To meet EPA reporting requirements these instruments have an EPA compliance reading mode. Depending on the measured sample and required accuracy, users can select normal measurement, continuous measurement or signal averaging.
Tag Identification System (T.I.S.)
Both models feature Hanna's Tag Identification System (T.I.S.) which allows users to record the time and place at unlimited specific measurement locations. Logged data can be downloaded through either USB or RS 232.
T.I.S. is easy to install and operate. Just place the iButton® tags near your sampling sites that need to be regularly checked. Use these instruments to take measurements and memorize the test results by pressing the Log-on-Demand key. The instruments identify and authenticate logged data by storing the iButton® serial number, time and date stamp by simply touching the iButton® with the matching connector on the instruments. The number of tags that can be installed is unlimited, and each tag has a unique identification code.
Calibration and Validation
Reliable performance of the instrument is validated using HANNA's exclusive CAL CHECK™ system and 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 intensity of the light source. The instruments' Good Laboratory Practice functions allow traceability of calibration conditions including the time, date and last calibration points.
With HANNA's exclusive CAL CHECK™ validation function users are able to verify the performance of the instrument at any time. 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.
Features
- Tungsten light source – EPA compliant turbidity measurement
- High accuracy at low ranges (below 0.05 NTU)
- Exclusive chlorine Cal Check™ calibration validation
- Exclusive T.I.S. Tag Identification System
- User replaceable light source
- 2, 3 or 4 point turbidity calibration
- USB and RS 232 connectivity
- Backlit LCD
- GLP capability
- User friendly display with guidance codes
- Auto shut-off
- Battery percentage display
- Continuous display of current time
Turbidity Measurement Technology
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. 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 optical system and measuring technique allow the compensation of lamp intensity fluctuations, minimizing the need of frequent calibration. The optical system of these instruments is designed to have very low stray light, providing accurate results for low turbidity samples every time.
Specifications
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.) |
Ordering Information
HI 98703 - EPA Compliant Turbidity Meter
Supplied with:
- Five sample cuvets and caps
- Three calibration cuvets for turbidimeter
- Silicone oil
- Five tag holders with tags (HI 920005)
- Scissors
- Batteries (4 pcs.)
- AC adapter
- Rugged carrying case
- Instruction manual
- Quick reference guide
- Instrument quality certificate
HI 93414 - EPA Compliant Turbidity and Chlorine Meter
Supplied with:
- Five sample cuvets and caps
- Three calibration cuvets for turbidimeter
- Two calibration cuvets for colorimeter
- Reagent powder packets for free & total chlorine
- Silicone oil
- Five tag holders with tags (HI 920005)
- Scissors
- Batteries (4 pcs.)
- AC adapter
- Rugged carrying case
- Instruction manual
- Quick reference guide
- Instrument quality certificate
Accessories
| HI 710005 |
Voltage adapter |
| HI 731318 |
Tissue for wiping cuvets (4 pcs) |
| HI 731331 |
Glass cuvets (4 pcs) |
| HI 740027P |
1.5V AA battery (12 pcs) |
| HI 92000 |
Windows® compatible software |
| HI 920005 |
5 tag holders with tags |
| HI 920011 |
5 to 9 pin RS232 connection cable |
| HI 93703-50 |
Cuvet cleaning solution (230 mL) |
