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MD 100 Chlorine DUO, powder reagents

Precise Water Analysis in High-Quality Design Mark as favourite

Part Number 276025


  • Lightweight, rugged design for use in the field
  • Single unit construction with no parts to lose or break
  • Large, easy to read display
  • Industry specific parameter combinations available

The MD 100 colorimeter is a single parameter colorimeter for water quality analysis. This line of rugged, waterproof instruments is lightweight and ideal for field testing or for use in the laboratory.
Chlorine is one of the most popular water quality testing parameters and the MD 100 Chlorine Duo Colorimeter offers a testing solution to fit a wide variety of industries and applications.
This instrument is pre-programmed with three testing ranges for testing Free, Total and Combined Chlorine. All testing ranges use the DPD method and utilize tablet or VARIO Powder Pack reagents, depending on the range selected.


  • Boiler Water
  • Cooling Water
  • Disinfection Control
  • Drinking Water Treatment
  • Pool Water Control
  • Pool Water Treatment
  • Raw Water Treatment
  • Waste Water Treatment

The MD 100 has several key features that make it a favorite among users.

  • Waterproof Design
    The IP 68 design of this instrument ensures that the MD 100 remains water tight for up to 1 hour at 0.1 meter.
    Don't worry about dropping the instrument into a body of water - it floats!
  • Accurate, Reproducible Results
    The optical system of the MD 100 utilizes LEDs and interference filters
    which quickly gives you results that you can be confident in.
  • User Calibration Mode
    A one-point calibration is possible. 
    Additionally, all MD 100 instruments have the ability to display readings directly in ABS or %T units.
  • One-time-Zero Function
    Don't waste time waiting for your instrument to Zero after each test.
    When testing a new sample, zero the instrument once and all subsequent tests of that sample do not require you to re-zero the instrument.
  • Automatic Data Storage with Transfer Capabilities
    The MD 100 automatically stores the last 16 readings with time and date stamp.
    These results can be transferred to a spreadsheet using the IRiM accessory.
  • Ergonomic Design
    Whether you're using the MD 100 out in the field or in the lab, the design of the instrument  makes it easy to handle and view the display.
    If you're using the instrument in the lab, the rubber feet on the bottom of the housing eliminates the need for two hand operation or to chase your instrument around the workbench.
  • Factory Programmed
    All MD 100 instruments are supplied ready to use with up to 14 calibration curves.
    All you need to do is select the test you need, prepare your sample and test!
  • Scroll Driven Menu System
    The simple interface allows you to quickly reach the test you need.
    When the instrument is turned on, it will automatically display the last test used.
  • 2-Year Warranty
Optics LEDs, interference filters (IF) and photo sensor in transparent sample chamber. Depending on the version, up to 3 different interference filters are used. Wavelength specifications of interference filters:
430 nm Δλ = 5 nm
530 nm Δλ = 5 nm
560 nm Δλ = 5 nm
580 nm Δλ = 5 nm
610 nm Δλ = 6 nm
660 nm Δλ = 5 nm
Wavelength Accuracy ± 1
Photometric Range -2600 - 2600 mAbs
Photometric Accuracy 3 % FS (T = 20 °C – 25 °C)
Operation Foil keypad
Display backlit LCD (on keypress)
Suitable Vials Round Cuvettes 24 mm
Calibration factory calibration and user calibration. Reset to factory calibration possible
Interfaces Infrared
Internal Storage internal ring memory for 16 data sets
Power Supply 4 micro batteries (AAA)
Battery Life Time approx. 17 hours
Auto – OFF Yes
Clock Real Time Clock and Date
Portability Portable
Environmental Conditions Temperature:  5 - 40 °C rel. humidity: 30 - 90 % (non condensing)
Compliance CE
Protection Class IP 68
Dimensions 155 x 75 x 35 mm
Weight 260 g
Testparameter Measuring Range Method No. Chemical Method
Chlorine HR PP 0.1 - 8 mg/l Cl2 M111 DPD
Chlorine PP 0.02 - 2 mg/l Cl2 M110 DPD
Title Measuring Range Chemical Method Packaging Unit Part Number Mark as favourite
Chlorine Free DPD F10 0.02 - 2 mg/l Cl2 a) DPD Powder / 100 pc. 530100
Chlorine Free DPD F10 0.02 - 2 mg/l Cl2 a) DPD Powder / 1000 pc. 530103
Chlorine Total DPD F10 0.02 - 2 mg/l Cl2 a) DPD Powder / 100 pc. 530120
Chlorine Total DPD F10 0.02 - 2 mg/l Cl2 a) DPD Powder / 1000 pc. 530123
Title Part Number Mark as favourite
ValidCheck Chlorine 1,5 mg/l 48105510
Micro batteries (AAA), set of 4 1950026
Measuring beaker, 100 ml 384801
Stirring rod, 13 cm length 364100
Stirring rod, 13 cm length, set of 10 364120
Stirring rod, 10 cm length 364109
Stirring rod, 10 cm length, set of 10 364130
Mixing cylinder, 25 ml 19802650
Membrane filter set for use when preparing samples, 25 membrane filters 0.45 µm, 2 syringes 20 ml 366150
Plastic funnel with handle (white) 471007
Brush, 11 cm length 380230
Water sampler, AF 631 170500
500 ml bottle, AF 631 375069
Round cuvette 24 mm, set of 12 197620
Round cuvette 24 mm, set of 5 197629
Round cuvette 16 mm, set of 10 197665
Multy cuvette-2, set of 12 197600
Cuvette stand for 6 round cuvettes Ø 24 mm 418951
Cuvette stand for 10 round cuvettes Ø 16 mm 418957
Adapter for round cuvettes 16 mm 19802190
Cleaning cloth 197635
Sealing ring for round vials 24 mm, set of 12 197626
Infrared data transmission modul IRiM 214050
Reference Standard Kit Chlorine - VARIO 0.2 and 1.0 275660
Verification Standard Kit MD 100 / 200 215670
Basic price for calibration certificate for each unit 999845
Additionally for each method 999855
Title Online Download Type Format Language Direct Download
Datasheet 276025 - MD 100 Chlorine DUO, powder reagents Datasheet PDF (0.20 MB)
Instruction Manual MD 100 Chlorine T/PP Instruction Manual PDF (1.72 MB)
Quick Start Guide - Additional features MD 100 / MD 200 Instruction Manual PDF (0.79 MB)
Instruction Manual Single Method Chlorine HR PP (Method No.: M111) Instruction Manual PDF (2.07 MB)
Instruction Manual Single Method Chlorine PP (Method No.: M110) Instruction Manual PDF (2.07 MB)
Data Acquisition Software Utility Program ZIP (124.72 MB)
Tintometer Chlorine Comparability Study Studies PDF (0.91 MB)
Declaration of Conformity md_100 Declaration of Conformity PDF (0.19 MB)
Validation Data Free Chlorine DPD F10 Validation Data PDF (0.12 MB)
Validation Data Total Chlorine DPD F10 Validation Data PDF (0.12 MB)
  • Instrument in plastic case
  • Chlorine Free Powder Packs
  • Chlorine Total Powder Packs
  • 4 micro batteries (AAA)
  • 3 round cuvettes (glass) with lid
  • 2 cuvettes (plastic) with lid
  • Sealing rings
  • Brush
  • Instruction manual
  • Quick Start Guide
  • Certificate (COC)
  • Warranty information
Title Part Number SDS Country Direct Download
Chlorine Free - DPD F10_PD 250 00530109
Chlorine Total - DPD F10_PD250 00530129