Hanna HI97733 Ammonia High Range Photometer 0-100 mg/L

Hanna HI97733 Ammonia high range portable photometer

The Hanna HI97733 is a pocket-sized, single-parameter photometer built for concentrated ammonia streams that would overrange the low and medium models. Its range is 0.0 to 100.0 mg/L expressed as ammonium, so streams such as sidestream liquors, sour-water related samples and fertiliser-plant condensates can be read without serial dilution. Seven Star LLC is an independent supplier in Muscat and is not affiliated with the manufacturer; we quote the HI97733 to industrial and laboratory buyers across Oman and the GCC.

The model number follows Hanna’s HI977xx pattern for dedicated photometers: the last digits identify the chemistry, so HI97733 always means ammonia high range and cannot be reconfigured for another analyte. Reagents carry their own HI93xxx codes, listed below, and must be ordered separately from the meter.

HI97733 technical specifications

How the HI97733 measurement works

The same Nessler reaction as the other ammonia models is used, but the high-range reagent set uses a 9 mL liquid reagent B volume mixed with the sample before zeroing, which sets up the larger concentration window. The reacted colour is measured at 420 nm against the unreacted blank.

Inside the case a reference detector tracks the LED output, so battery sag or a warm ambient does not move the blank. A lens gathers the light leaving the cuvette, which is why scratches and small glass imperfections matter less than with a simple colorimeter, and the cap notch locks the cuvette in the same orientation every time. A built-in tutorial mode walks the operator through sampling, reagent quantity and timers on screen, so the instrument can be handed to a technician who is not a chemist.

Reagents, procedure and interferences for HI97733

The cuvette is filled with 9 mL of HI93733B-0 and topped up to the 10 mL mark with sample, inverted five times and zeroed; four drops of HI93733A-0 are then added, mixed, and the meter runs a 3 minute 30 second countdown before reading.

Reagent sets are supplied as HI93733-01 (100 tests) and HI93733-03 (300 tests). Follow the zeroing order given in the manual for this method, and read within the time the manual allows after the countdown ends.

Known interferences listed for this method:

• Hardness above 1 g/L
• Iron
• Sulfide, which may cause turbidity
• Acetone above 0.1 %, alcohols, aldehydes, aliphatic and aromatic amines, chloramines, glycine or urea above 10 mg/L; distillation removes these

Where the HI97733 sits among Hanna photometers

Treat the HI97733 as the screening tool for concentrated ammonia and the HI97715 or HI97700 as the finishing tools once values drop. Because results are shown in NH₄⁺, convert to nitrogen basis if your reporting format requires it.

Selection and ordering checklist for HI97733

• Confirm expected ammonium is between 0.1 and 100.0 mg/L
• Note the larger 9 mL reagent B volume, which means reagent sets are consumed faster than on the low-range models
• Order HI93733-01 or HI93733-03 separately
• Consider CAL Check kit HI97733-11 for routine validation
• Confirm waste handling for the reacted Nessler solution under site rules

Validation, handling and maintenance of HI97733

Validate with the HI97733-11 CAL Check cuvettes before critical batches. Rinse the cuvette thoroughly between samples because concentrated ammonia and Nessler residue can carry over, and clean with the Hanna cleaning solution if staining appears.

Keep cuvettes clean with the cleaning solution and a lint-free cloth, never touch the lower half of the glass, and store the meter in its carrying case. Replace the three AA cells when the battery icon appears; the meter keeps its logged readings and settings. For long storage between field trips remove the batteries and close the reagent bottles tightly.

Typical applications of HI97733 in Oman and the GCC

Fertiliser and ammonia-related process units, refinery sour-water and wastewater treatment, aquaculture hatchery sumps and food or beverage plants in the GCC benefit from a meter that reads up to 100 mg/L directly. In desalination chemical-cleaning waste and in industrial evaporation ponds it provides a quick on-site number before laboratory confirmation.

Heat is a practical factor in the Gulf. Reaction times in the manual are given at 25 °C, so samples that sit in a vehicle at much higher temperature should be allowed to equilibrate, and the meter itself is rated for 0 to 50 °C. The sealed optics and IP67 floating case also cope with dust and spray on plant walkdowns.

Information to send with an RFQ for HI97733

• Quantity of meters and whether reagent sets (HI93733-01 or HI93733-03; CAL Check HI97733-11) and CAL Check cuvettes are also required
• Sample matrix and expected concentration, so we can confirm the range suits the application
• Delivery location in Oman or the GCC and required lead time
• Any need for spare cuvettes, carrying case or cleaning solution
• Project or tender reference, if applicable

Documents and quotation

The instruction manual for the HI97733 is attached on this page and covers specifications, the reagent procedure, CAL Check validation and error messages.

Send the part number HI97733, the quantity and your delivery location and we will reply with availability and a quotation.