MD50 Chlorine
Use it to measure free and total chlorine in water on site with the DPD method. It covers 0.02 to 10 mg/L Cl2 across five methods, using tablet, powder pack or liquid reagents. It is portable and rated IP 67, and it stores 100 results in its internal memory.
Highlights
The method table lists five DPD methods using liquid, tablet or powder pack reagents. Together they cover 0.02 to 10 mg/L Cl2.
The instrument is rated IP 67 and weighs 247 g. Environmental conditions are 5 to 50 °C at 30 to 95 % humidity, non-condensing.
Interfaces are USB-C and NFC. Data transfers in .csv format, and the internal ring memory holds 100 data records.
The instrument accepts user adjustment, with return to factory adjustment possible at any time. Firmware and methods can be updated.
Methods and ranges
The table lists all 5 methods. The list covers chlorine by the DPD method with tablet, powder pack and liquid reagents, across a range of 0.02 to 10 mg/L Cl2. Every version carries all of these methods, and the version chosen only sets which reagents are supplied.
| Parameter | Range | Method | Reagent |
|---|---|---|---|
| Chlorine HR 2 PP | 0.1 - 10 mg/L Cl2 | DPD | Powder pack |
| Chlorine HR T | 0.1 - 10 mg/L Cl2 | DPD | Tablet |
| Chlorine L | 0.02 - 4.0 mg/L Cl2 | DPD | Liquid |
| Chlorine PP | 0.02 - 2 mg/L Cl2 | DPD | Powder pack |
| Chlorine T | 0.02 - 6.0 mg/L Cl2 | DPD | Tablet |
Configurations
Every configuration is the same MD50 Chlorine photometer with all five DPD methods and the same carrying case, cuvettes and accessories, and the only difference is the reagent type supplied: tablets, powder packs or liquid.
Tablet reagents
Supplied with 100 DPD No.1 and 100 DPD No.3 Evo tablets.
Powder reagents
Supplied with 100 Chlorine Free and 100 Chlorine Total powder packs.
Liquid reagents
Supplied with 15 mL each of DPD 1 buffer, DPD 1 reagent and DPD 3 solution.
Reagents & consumables
We keep these in stock for the MD50 Chlorine. We quote part numbers per instrument on enquiry, checked against the current price list.
Liquid reagents, Powder packs, Tablet reagents
Tablets, pre-measured powder packs, liquid reagents and sealed tube tests for the methods already programmed into the instrument.
Calibration standards
Calibration standards, pH buffers and electrolyte solutions for calibrating the instrument.
Cuvettes & sample cells
Round cells, cuvettes and caps.
Specifications
Tags and applications
Select any tag to see every other instrument that carries it. A tag with no link is one this line does not filter on.
Downloads
Common questions
What chlorine ranges does the MD50 Chlorine measure?
It has five DPD methods. Chlorine L covers 0.02 to 4.0 mg/L Cl2 with liquid reagent. Chlorine T covers 0.02 to 6.0 mg/L Cl2 with tablets. Chlorine PP covers 0.02 to 2 mg/L Cl2 with powder packs. Chlorine HR T and Chlorine HR 2 PP both cover 0.1 to 10 mg/L Cl2, with tablets and powder packs respectively.
What is the difference between the tablet, powder and liquid versions?
Only the reagents supplied differ. Every version has the same instrument and the same five methods. The tablet version (280100) comes with 100 DPD No.1 and 100 DPD No.3 Evo tablets. The powder version (280105) comes with 100 Chlorine Free and 100 Chlorine Total powder packs. The liquid version (280102) comes with 15 mL each of DPD 1 buffer, DPD 1 reagent and DPD 3 solution.
Can I run a method with a reagent format other than the one supplied?
The method table lists the reagent format for each method. Running a method needs the matching reagent. Whether a particular reagent can be supplied with your order is a case-by-case question, so please ask us.
How accurate is it?
The photometric accuracy is 3 % FS at 20 °C to 25 °C. The photometric range is 0 to 3 Abs. The calibration is set at the factory and can be user adjusted. Return to the factory adjustment is possible at any time.
Is it suitable for use in the field?
It is portable, weighs 247 g and measures 155 x 76 x 45 mm. It is rated IP 67. The stated environmental conditions are 5 to 50 °C at 30 to 95 % relative humidity, non-condensing. It runs on 2 AA alkaline batteries, good for approx. 5000 measurements without the backlight.
How do I get results off the instrument?
It has USB-C and NFC interfaces, and data is transferred in .csv format. The internal ring memory holds 100 data records. Firmware and method updates are supported, and programming is done with PC software.
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Tell us what you need to measure.
Send the parameters and ranges you need, and we will confirm the right configuration and price. Your enquiry will name this product.