Hanna HI93414 Portable Turbidity and Chlorine Meter

Hanna HI93414 portable turbidity and chlorine meter

The Hanna HI93414 is a portable microprocessor meter that combines ratio nephelometric turbidity measurement from 0.00 to 1000 NTU with free and total chlorine testing from 0.00 to 5.00 mg/L. One housing therefore covers the two parameters most often checked together on a treatment-plant walk. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer.

The turbidity side adapts US EPA Method 180.1 and Standard Method 2130 B; the chlorine side adapts US EPA Method 330.5 and Standard Method 4500-Cl G using DPD reagent. Many sites order the unit with its calibration standards and reagents so that it is usable on arrival.

HI93414 technical specifications

How the HI93414 works

For turbidity, a tungsten lamp lights the sample and detectors measure both light scattered at 90 degrees and light transmitted straight through; the meter uses the ratio of the two, which compensates for sample colour and lamp ageing and extends the linear range. Operators can choose normal, average or continuous measuring modes.

For chlorine, DPD reacts with free chlorine to give a pink tint, and a second reagent addition reveals total chlorine. The meter reads the tint at 525 nm and displays mg/L. A one-point chlorine calibration against 1 mg/L free and total standards is provided for periodic verification.

Where HI93414 fits: sensors, accessories and related models

Consumables are the turbidity standards (below 0.1, 15, 100 and 750 NTU), free and total chlorine reagent packets or liquids, cuvettes with caps, and silicone oil for cuvette wiping. The meter connects by RS232 or USB for data transfer, and can run from batteries or from an AC adapter on the bench.

The infrared ISO 7027 alternative for turbidity alone is the HI93703-11.

HI93414 family comparison

Choose the HI93414 when one instrument must give turbidity in NTU and chlorine residuals, as in filtration and disinfection monitoring; choose the HI93703-11 for ISO 7027 turbidity alone.

Selection and ordering checklist for HI93414

• Confirm the need for both turbidity and chlorine in one instrument
• Specify turbidity standards and calibration points (two, three or four)
• Order DPD reagents for free and total chlorine and spare cuvettes
• Decide on battery or AC adapter operation and RS232 or USB connection
• Check whether silicone oil and cleaning supplies are needed

Installation, calibration and maintenance of HI93414

Calibrate turbidity with the standards below 0.1, 15, 100 and 750 NTU as appropriate to your range, using matched clean cuvettes. Calibrate chlorine against the 1 mg/L standards when verification is required. Always zero chlorine with the unreacted sample as directed in the manual.

Wipe cuvettes with lint-free cloth and a thin film of silicone oil, avoid fingerprints, and cap tightly to prevent evaporation. The lamp is rated for more than 100,000 readings, so lamp replacement is rare, but the optical well should be kept free from spills.

For turbidity near the bottom of the scale, bubbles and cuvette scratches dominate error. Let sample bubbles rise, invert gently, and keep a dedicated cuvette for low-level measurements. Run the continuous or averaging mode when the reading fluctuates, which smooths out particle noise.

For chlorine, analyse as soon as possible after sampling because chlorine decays; free and total tests use separate fresh samples and the reacted solution should be disposed of according to site rules.

Typical applications of HI93414 in Oman and the GCC

In Oman the HI93414 serves drinking-water works, hotel and resort water systems, bulk water tanker checks, desalination post-treatment and filtration monitoring, and municipal or industrial water distribution inspections where both clarity and disinfectant residual are logged. The 200-record memory and serial output help operators assemble compliance records.

A single bench-or-field meter simplifies training and calibration records for contractors who service many small water systems.

Information to send with an RFQ for HI93414

• Quantity and calibration standards required
• Chlorine reagent type and quantity (powder or liquid)
• Spare cuvettes, silicone oil and AC adapter
• Delivery location and lead time
• Project or tender reference

Storage, handling and spares for the Hanna HI93414

Store the Hanna HI93414 in its case in a clean, dry place. Keep probes, electrodes and reagents as described in the user manual, as many of them need a storage solution or have a limited shelf life. In the GCC climate, keep reagents away from heat and direct sun and check expiry dates before use.

• Calibrate the instrument with fresh standards at the interval your procedure requires.
• Rinse probes and sample cells after each use and inspect them for scratches or deposits.
• Keep spare consumables, such as reagents, standards, cuvettes and electrode solutions, in stock.
• Record calibration results so that drift or probe ageing can be seen early.

When you order the Hanna HI93414, list the consumables and standards you need in the same RFQ, so the instrument can be used from the day it arrives.

Documents and quotation

The instruction manual for the HI93414 is attached on this page for specifications, calibration procedures and maintenance steps.

Send the part number HI93414, the quantity and your delivery location and we will reply with availability and a quotation.