Advanced portable photometer for the measurement of aluminum in water. This meter offers a superior optical system that utilizes a reference detector and narrow band interference filters for extremely fast and repeatable measurements.

• No warm up time before taking a measurement
• Tutorial mode for step-by-step instructions
• CAL Check to verify meter performance

This photometer uses an adaptation of the Aluminon Method per Standard Methods for the Examination of Water and Wastewater, 23rd edition, to measure aluminum concentrations up to 1.00 mg/L (ppm). When the aluminon buffer reagent is added to samples containing aluminum, the sample will turn a reddish hue; the greater the concentration, the deeper the color. The associated color change is then colorimetrically analyzed according to the Beer-Lambert Law. This principle states that light is absorbed by a complementary color, and the emitted radiation is dependent upon concentration. For aluminum determination, a narrow band interference filter at 525 nm allows only green light to be emitted and passed through the sample cuvette. As the change in color of the reacted sample increases, absorbance of the specific wavelength of light also increases, while transmittance decreases.

This innovative optical system offers superior performance in accuracy, repeatability, and required time to perform a measurement. This compact, waterproof meter has a tutorial mode that walks the user graphically, step by step, to perform a measurement. The compact design fits comfortable in the hand for use in the field or on a table for benchtop use.

Specifications

• Aluminum range: 0.00 to 1.00 mg/L (as Al³⁺)
• Aluminum resolution: 0.01 mg/L
• Aluminum accuracy: ±0.04 mg/L ±4% of reading at 25°C
• LED with 525 nm bandpass filter
• Silicon photocell
• Bandpass filter bandwidth: 8 nm
• Bandpass filter wavelength accuracy: ±1.0 nm
• Cuvette type: round 24.6 mm diameter (22 mm inside)
• 128 x 64 pixel B/W LCD with backlight display
• Logging memory: 50 readings
• 1.5 V AA Alkaline (3 pcs.) / > 800 measurements (without backlight)
• Automatic shut-off after 15 minutes of inactivity (30 minutes before a READ measurement)
• Dimensions: 5.6" x 4.0" x 2.0"