Portable and Bench Turbidimeter | |
Features of the HD25.2
Turbidimeter
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Introduction to the HD25.2 portable turbidimeter |
The HD25.2 is a digital turbidity meter for laboratory and mobile use, suitable for measurements in drinking water, waste water and process liquids. The working principle is based on the nephelometric (90° scattered light sensor) method. It is equipped with three light detectors and two LED light sources (white and infrared) which are permanently kept under control in order to guarantee long-term stability. The instrument performs measurements according to the standards EPA 180.1, ISO-NEPH (ISO 7027), EBC and ASBC. It is also able to carry out measures of transmission factor percentage of white and infrared light. Nephelometers measure the intensity of light scattered by contaminants such as suspended and colloidal matter like clay and silt, and microscopic organisms. Turbidimeters using the nephelometric principal compare the light scattered due to contamination with the light scattering from a standard reference suspension. The result is a measurement of turbidity in NTUs - Nephelometric Turbidity Units. The initial factory calibration is based on Formazin primary standard. For routine calibration a set of stabilized secondary standard solutions is available: STCAL (Turbidity standards for calibration): STCAL 1 less than 0,05 NTU STCAL 2 equal to 8 NTU STCAL 3 equal to 80 NTU STCAL 4 equal to 800 NTU. User Manual - HD25.2 |
Specification - HD25.2 Turbidimeter |
Measuring Methods: |
EPA180.1/ ISO-NEPH (ISO 7027) / EBC / ASBC / White %T and IR %T
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Measurement Range: |
EPA180.1: 0-1000 NTU ISO-NEPH: 0-1000 FNU EBC: 0-250 EBC ASBC: 0-999 ASBC WHITE %T: 0-100%T IR %T: 0-100%T
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Principle | Nephelometric 90 degree scattered light sensor |
Light Source | LED IR 850nm / White LED 470nm |
Data Loggin | 999 Samples |
Accuracy |
+/- 2% of
reading + 0.01 NTU (0-500 NTU)
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Repeatability | +/- 2% of reading or 0.01 NTU |
Resolution |
0.01 NTU (0 - 9.99 NTU) 0.1 NTU (10-99.9 NTU) 1 NTU (100 - 1000 NTU) |
Working Temperature | 0 - 50C |
Display: | LCD 52 x 42mm |
Power Supply: | 3 - AA Batteries 1800mAh |
Sample Cells: | 20mL - 24mm diameter x 68 mm tall |
Materials:Instrument
Case: Carry Case |
ABS / Rubber |
Dimensions | 220 x 120 x 55 (mm) |
Weight | 400g |
Ordering Information |
Model HD25.2 |
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Calibration Kit 4 Calibration standards with formazin reference STCAL 1 (0.05 NTU), STCAL 2 (8 NTU), STCAL 3 (80 NTU), STCAL 4 (800 NTU). |
$231.00 |
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Accesories |
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HD40.1 - 24-column portable thermal printer, serial interface, 57mm paper width, four NiMH 1.2V rechargeable batteries, SWD10 power supply, instruction manual, 5 thermal paper rolls. Requires the cable 9CPRS232 (optional) |
$370.00 |
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|Topac Inc. 231 CJC Highway, Suite 103 Cohasset MA 02025 USA
Tel:
781 740 8778 Fax: 781 740 8779
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