A digital photometer is the gold standard for fast, accurate colorimetric water analysis. Unlike test strips or manual titration kits, a photometer measures the absorbance of light through a reagent-treated water sample to deliver precise, repeatable results in milligrams per litre (mg/L) or parts per million (ppm) – every time.
Pacific Sensor Technologies is an authorised Australian distributor of Milwaukee Meters photometers, engineered for professionals in water treatment, aquaculture, food & beverage processing, environmental monitoring and commercial pool compliance.
Our range covers:
All PRO-series photometers feature a backlit LCD, auto-calibration, GLP data storage, and IP67 waterproofing. Compact handy testers (MW10/MW11/MW12/MW13/MW14) offer single-parameter simplicity for on-site spot checks at a fraction of the cost.
A digital photometer is the gold standard for fast, accurate colorimetric water analysis....
Free chlorine handy photometer
Range: 0.00 …
Total chlorine handy photometer
Range: 0.00…
Phosphate handy photometer
Range: 0.00 to 2…
Iodine handy photometer
Range: 0.0 to 12.5 …
Iron handy photometer
Range: 0.00 to 5.00 p…
Free & Total Chlorine Professional Photometer…
Ammonia (Medium Range) Professional Photometer
Free Chlorine Professional Photometer
0.00 …
Ammonia (Low Range) Professional Photometer
…
Iron (High Range) Professional Photometer
0…
Free & Total Chlorine and pH Professional Pho…
Phosphate (Low Range) Professional Photometer
Free & Total Chlorine (High Range) Profession…
Chloride Professional Photometer
0.00 to 20…
Turbidity meter, Range: 0.00 to 50.00 (FNU) | 50 …
Photometer for the determination of peroxide valu…
Range 0.00 to 2.50 mg/L
Range 0.0 to 30.0 mg/L
Selecting the right photometer comes down to three key decisions: the parameter you need to measure, the concentration range in your water sample, and whether you need laboratory-grade GLP compliance or a rapid field tool.
A photometer for water testing is not the same instrument as the light meters that share the name. A water-testing photometer – also called a colorimeter – passes a fixed wavelength of light through a sample that has been treated with a parameter-specific reagent, and converts the absorbance into a concentration reading. Light meters, lux meters and photographic exposure meters measure illuminance in the surrounding environment and cannot analyse a water sample.
For water analysis you are choosing on three things: the parameter, the concentration range, and whether results need to be logged for compliance. Every instrument on this page is a water-testing photometer supplied with the matched Milwaukee or Hanna reagent chemistry.
Why Buy From Pacific Sensor Technologies?
• Authorised Milwaukee Meters distributor — genuine products with full Australian warranty
• Fast shipping Australia-wide from Melbourne stock
• Expert technical support: call 1300 662 720 or email sales@pacificsensortech.com.au
A photometer measures the concentration of a specific chemical in a water sample by detecting how much light is absorbed after the sample is treated with a reagent. It is widely used to test chlorine, ammonia, iron, phosphate, and turbidity in pools, aquaculture systems, drinking water, and wastewater treatment.
The terms are often used interchangeably in water analysis. Technically, a colorimeter uses a broadband light source with colour filters, while a photometer uses a monochromatic (LED) light source for greater accuracy and selectivity. Milwaukee PRO photometers use LED-based optics for superior precision.
Milwaukee PRO photometers are factory-calibrated and shipped ready to use. In-field calibration is recommended periodically (every 3–6 months depending on usage intensity) or whenever a new reagent batch is introduced. The handy MW-series testers feature a single-point auto-calibration function.
Milwaukee reagents are formulated specifically for Milwaukee photometer calibration curves. Using third-party reagents may produce inaccurate results and will void the warranty. We stock the full range of Milwaukee replacement reagent kits.
For standard pool and potable water monitoring, the Mi404 (0.00–3.50 mg/L) and Mi406 (0.00–3.50 mg/L) are ideal. For water treatment facilities or industrial applications with higher chlorine concentrations, the Mi413 (0.00–10.00 mg/L) is recommended.
Yes. Pacific Sensor Technologies offers instrument calibration services with NATA-traceable standards. Contact our team on 1300 662 720 or visit our Calibration Services page to arrange a quote.
No. In water analysis a photometer measures the concentration of a dissolved chemical by passing light through a reagent-treated sample and measuring absorbance. A light meter or lux meter measures the brightness of ambient light and cannot analyse water. Both are called photometers, which is why water-testing instruments are often listed as colorimeters. Every instrument on this page is a water-analysis photometer.
Pacific Sensor Technologies stocks photometers for free and total chlorine, ammonia (low and medium range), phosphate (low and high range), iron, chloride, iodine, turbidity, peroxide value in edible oils, and combined pH with chlorine. Each instrument is factory-calibrated for its parameter and supplied with the matched reagent chemistry.
Test strips give a visual colour match, typically resolving to whole steps such as 0.5 or 1.0 mg/L, and depend on the operator's colour perception and the lighting. A photometer reads absorbance electronically to 0.01 mg/L on most parameters, giving a repeatable numeric result that can be logged for HACCP or compliance records.
