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Ohaus a-AP50MM-F Photometer

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Fixed Wavelength
365 nm; 420 nm; 455 nm; 525 nm; 560 nm; 570 nm; 630 nm
Photometric Measuring Range
0 Abs to 1 Abs
Photometric Accuracy
± 0.005 Abs @1.0 Abs Nominal
Turbidity Optical System
Nephelometric
Wavelength Accuracy
± 1.0nm
All 23 specifications
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Specifications 23

Brands
Ohaus
New/Used
New
Fixed Wavelength
365 nm; 420 nm; 455 nm; 525 nm; 560 nm; 570 nm; 630 nm
Photometric Measuring Range
0 Abs to 1 Abs
Photometric Accuracy
± 0.005 Abs @1.0 Abs Nominal
Turbidity Optical System
Nephelometric
Wavelength Accuracy
± 1.0nm
Wavelength Selection
Automatic
Turbidity Reproducibility
1 NTU
Turbidity Measuring Range NTU
0 to 200
Turbidity Detection Limit NTU
1
Turbidity Excitation Wavelength
IR LED; White
Data Storage
30,000 Group with Date, Time
Battery Life
6 months (typical) at 25 readings a week
Display
Backlit Graphical LCD, 160×240 pixels
Sample Vials Compatibility
Round Ø24mm
Source Lamp
Light Emitting Diode (LED)
Storage temperature range
18 °C - 60 °C ~ 0 °F - 140 °F
Working Altitude
Up to 2000m
Working Environment
4 ~ 41 °C , 85%RH, non-condensing (40 ~ 106 ºF, 85%RH, non-condensing)
Dimensions (LxHxW)
10.43 in x 2.72 in x 3.47 in (265 mm x 69 mm x 88 mm)
Weight
1.32 lb (0.6 kg)
Power
4 AA (LR6) Batteries (Included)

Product description

Compact, versatile photometer for precise, portable water analysis.

Ohaus a-AP50MM-F Photometer

Fixed Wavelength 365 nm; 420 nm; 455 nm; 525 nm; 560 nm; 570 nm; 630 nm Photometric Measuring Range 0 Abs to 1 Abs Wavelength Accuracy ±1.0nm

Features

  • The AP50MM is equipped with a real-time dynamic display for eachmeasurement, to provide fast, reliable results
  • Can record up to 30,000 datapointswith time and date stamp
  • Built-in calibration curves provide automatic selection of appropriatewavelengths from the long-lasting LED light source, store commonly used tests for efficiency
  • Large, backlit display makes it easier to read real-time results
  • Fixed wavelengths: 365 nm, 420 nm, 455 nm, 525 nm, 560 nm, 570 nm, 630 nm
  • Turbidity optical system based on nephelometric measurement
  • Photometric accuracy of ± 0.005 Abs at 1.0 Abs nominal
  • Compact and lightweight design weighing only 1.32 lb (0.6 kg)
  • Operates on 4 AA (LR6) batteries with a typical life of 6 months

The Ohaus a-AP50MM-F Photometer is a multifunctional, portable device engineered to deliver fast and reliable colorimetric and turbidity measurements in diverse field applications. Featuring a real-time dynamic display, it provides accurate results with ease, supported by a nephelometric turbidity optical system. With the ability to store up to 30,000 data points complete with time and date stamps, this photometer ensures comprehensive data management for consistent performance.

Equipped with built-in calibration curves, the a-AP50MM-F automatically selects the optimal wavelength from its long-lasting LED light source, enhancing efficiency for commonly used tests. Its large, backlit graphical LCD allows for effortless readability of results, even in challenging environments. The compact and lightweight design, weighing only 1.32 lbs, and operation powered by 4 AA batteries with a typical lifespan of six months, make it an ideal companion for on-the-go professionals.

With fixed wavelengths ranging from 365 nm to 630 nm, a photometric accuracy of ± 0.005 Abs, and robust construction, the a-AP50MM-F combines precision and durability. Designed for practicality, it includes a rugged single-handed design and a hard-shell carrying case with all necessary accessories, making it the ultimate solution for efficient and portable water sample analysis.

INCLUDED: The Ohaus a-AP50MM-F Photometer includes:

  • 2 x 24 mm Replacement Vials, 10mL
  • 2 x 24 mm Replacement Vials, 25mL
  • 1 x 16mm Adapter A-AP50MM for COD
  • 4 AA Alkaline Batteries
  • Briefcase AQUASEARHER
  • Operator's Guide
  • Manufacturer's Documentation
  • 1 Year Manufacturer's Warranty

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Frequently asked questions

How long does laboratory equipment typically last?

With a service contract, ten to fifteen years is normal for most benchtop instruments. Detectors and pumps are the parts that wear first.

Can I get service for older equipment?

Often, yes. Verified suppliers frequently work with service partners converting the instrument. If applicable, we can list servicing options alongside the offer.

Where can I buy parts?

Ask a scientist through the request button. Parts are often available even when the instrument itself is discontinued.

What is the typical lead time for refurbished equipment?

Two to six weeks, depending on refurbishment scope and whether calibration is included.

Does laboratory equipment ship internationally?

We ship to 38 countries. Crating and customs handling are quoted with the instrument.

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Last updated 6 November 2026