
M100+™ Laboratory Turbidimeter
ES-HF-M100-Plus
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Engineer 
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M100+TM 
Laboratory Turbidimeter
The M100+™ Laboratory Turbidimeter offers an easy solution 
for verifying operation of online turbidimeters like the MTOL+. 
The color touchscreen interface provides fast access to settings, 
data and calibration functions. Features such as the Auto Alert 
Calibration Prompt simplify maintenance. With a resolution of 
up to 0.0001 NTU at low turbidity readings and an extended 
range up to 4,000 NTU, the M100+ is an ideal and affordable 
tool for research as well as routine analytical measurements. The 
M100+ includes a USB port for downloading logged data and 
fi rmware updating. 
Features
• Auto Ranging from 0 to 4000 NTU
Instrument senses the turbidity level of sample and 
automatically adjusts the measurement range 
• Calibration Alert
The M100+ prompts the operator when calibration is required
• Simple Calibration Procedure
Insert the calibration standard and initiate calibration with the 
press of a button
• Data Logging
Download historical NTU readings through USB connection or 
send to a printer or data recorder
• Infrared and White Light Model Options
Choose EPA 180.1 compliant white light or ISO 7027 infrared 
model 
• Reusable ProCal Calibration Standards
Quick, easy calibration across all ranges without need to mix 
Formazin
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NOTICE
The information contained herein is not intended to replace the full 
product installation and safety information available or the experience 
of a trained product installer. You are required to thoroughly read all 
installation instructions and product safety information before beginning the installation of this product.
HF scientific product specifications in U.S. customary units and metric are approximate and are provided for reference only. For precise 
measurements, please contact HF scientific Technical Service. HF scientific reserves the right to change or modify product design, construction, 
specifications, or materials without prior notice and without incurring any obligation to make such changes and modifications on HF scientific 
products previously or subsequently sold.

Specifications
Ordering Information
Range: Auto ranging from 0 – 4000 NTU
Measurement Principle: Nephelometric below 1000 NTU / Ratio above 1000 NTU
Accuracy:
Resolution: Selectable up to 0.0001 NTU
Response Time: ≤ 3 seconds
Sample Size: 30 ml (27 ml minimum)
Light Source: White light (tungsten filament) or Infrared (860nm LED)
Operating Temperature: 1°C – 40°C (34°F – 104°F)
Outputs: USB
Dimensions: 10.75 x 10 x 3.75 in. (27.3 x 25.4 x 9.5 cm)
Weight: 2.9 lbs. (1.32 kg)
Safety Rating: UL, CSA (LC mark), CE
Note: The M100+ meets performance criteria specified by USEPA method 180.1 (white 
light version) and ISO 7027 (Infrared version) for NTU measurement.
2% of reading or ± 0.02 NTU below 40 NTU, whichever 
is Greater ±5% of reading above 40 NTU 
Specifications subject to change without notice.
CAT. NO. MODEL NTU RANGE USEPA METHOD 
180.1
28060 White Light 0-4000 x  
28061 Infrared 0-4000  x
All units include a set of ProCal Calibration Standards (0-4000 NTU), two measuring 
cuvettes with light shield caps, operator’s manual, and plug-in power adapter.
ISO 7027
Calibration Kits/Standards
PART # DESCRIPTION
39940 ProCal Calibration Kit (0-4000 NTU for M100+ White Light) 
39941 ProCal Calibration Kit (0-4000 NTU for M100+ Infrared) 
39957 ProCal Calibration Kit (0-1000 NTU)
39825 ProCal Calibration Standard 10 NTU, 125 ml
50040 Formazin Stock Solution Kit
Spare Parts
PART # DESCRIPTION
50051 Cuvettes 28 x 70 mm, 3 pack
50052 Cuvettes 28 x 70 mm, 10 pack
24082S Replacement Lamp Assembly White Light
21396S Replacement Lamp Assembly IR Light
ProCal Calibration Set
• EPA approved, pre-diluted standards 
that can be used for HF Scientifi c 
turbidimeters as well as others.
• More Stable than Formazin
• Easy to work with
•  Non-Hazardous
USA: T: (239) 337-2116 • Toll-Free (888) 203-7248 • F: (239) 332-7643 • HFscientific.com
Latin America: T: (52) 81-1001-8600 • HFscientific.com
ES-HF-M100-Plus  1926    © 2019 HF scientific