Photometer ST 3300

The ST3300 are economical photometer in small package for any application. This portable photometer allow you to easily take readings directly in the field for 100+ parameters. Selecting the desired test has never been easier. Simply choose among the list of available tests on the large graphic display and the instrument will walk you through the test procedure – it’s that easy! Simple. Convenient. Accurate.

Direct reading concentrations

Waterproof IP-67 rating
Large, backlit graphic display
Sample tube holder automatically adjusts for various diameters
On-screen instructions virtually eliminates reading manuals
Multiple languages (English, French, German, Spanish, Italian)
100+ test choices

You can rely on the accuracy and reliability of ST3300 photometer. Just choose the reagents for the parameters of interest and start getting results today.

The ST3300 includes hard-sided carrying case with foam cutouts for the instrument, accessories, reagents (sold separately), and more.

You may also be interested in the ST3300 photometer which includes waterproof USB cable, internal memory, and user-selectable test options.

Specification :

Benchtop	Yes
Certifications	IP-67
Display	Graphic, backlit LCD with on-screen instructions
Languages	Spanish, English, German, Italian, French
Measurement Method / Channels	Wavelengths
Parameters Measured	Alkalinity Aluminum Ammonia Bromine Hardness Chloride Chlorine Chromium Color Copper Cyanuric Acid Dissolved Oxygen Fluoride Hydrazine Hydrogen Peroxide Iron Magnesium Manganese Molybdate Nickel Nitrate Nitrite Organophosphonate Ozone pH PHMB Phenol Phosphate Potassium Silica Sulfate Sulfide Sulfite Zinc
Power	3x AA batteries
Sampling	Yes
Warranty	1-year instrument
Waterproof	Yes

Precise, Easy-to-Use Colorimetric Analysis with the Photometer ST 3300

Achieve reliable quantitative measurements of water quality, chemical concentrations, and biological assays with the Photometer ST 3300—a compact, high-performance instrument engineered for environmental testing, food & beverage, aquaculture, education, and industrial process control. Utilizing precision LED optics and pre-programmed methods, the ST 3300 delivers accurate absorbance and concentration results for over 50 common parameters, including chlorine, nitrate, phosphate, iron, hardness, and more.

Engineered for Simplicity, Accuracy, and Field Readiness

The ST 3300 Photometer features a long-life LED light source at fixed wavelengths (e.g., 430 nm, 530 nm, 560 nm, 610 nm) to match standard reagent chemistries, ensuring excellent repeatability and minimal drift. Its intuitive interface guides users through step-by-step testing, automatically converting absorbance readings into concentration values (mg/L, ppm, etc.) using factory-calibrated curves. Just add reagent, insert the sample cell, and read the result in seconds.

50+ Pre-Programmed Methods – Includes chlorine (free/total), nitrate, phosphate, COD, iron, copper, hardness, and more.
High Accuracy & Repeatability – ±2% full scale; ideal for compliance and routine QC.
Automatic Wavelength Selection – No manual filters; the meter selects the correct LED based on the chosen test.
Large Backlit Display – Clear readout of concentration, absorbance, and battery status.
Compact & Battery-Powered – Lightweight design with 1,000+ tests per set of AAA batteries.
IP67 Waterproof Option Available – Ruggedized version for field and wet-environment use.

Trusted for Water and Process Quality Assurance

From verifying disinfectant levels in drinking water and monitoring nutrient runoff in agriculture to checking metal concentrations in plating baths or teaching Beer’s Law in classrooms, the ST 3300 offers lab-quality colorimetry without complexity. Its use of standard reagent vials (16 mm or 24 mm) ensures compatibility with widely available test kits from major brands.

Whether you’re a municipal operator, food safety officer, or student, the Photometer ST 3300 makes professional photometric analysis fast, accurate, and accessible.

See the color. Know the concentration. Trust the result.