Home Products Alat Kualitas Air Turbidity Meter HD25.2 (DELTA OHM)
Turbidity Meter HD25.2 (DELTA OHM)

Turbidity-Meter-HD25.2The HD25.2 is a digital turbidity meter for laboratory equipment indonesia and mobile use, suitable for measurements in drinking water, beverages, waste water and process liquids. The working principle is based on the nephelometric (90° scattered light sensor) and ratiometric 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.


Technical characteristics

Dimensions (Length x Width x Height) 220x120x55mm
Weight 400g (batteries included)
Materials ABS
Display LCD

4½ characters plus symbols

Visible area: 52x42mm

Operating conditions
Instrument working temperature 0 … 50°C
Storing temperature instrument -25 … 65°C
Working relative humidity 0 … 90% R.H. without condensation
Storing of Calibration standards 5…25°C (temperature should not exceed,
protect from light)
Protection degree IP66
Power supply
Batteries 3 1,5 V AA type batteries
Autonomy 100 hours with 1800mAh alkaline
Rete (cod. SWD10) Mains adapter
Measuring methods
Standard EPA180.1, ISO-NEPH (ISO 7027), EBC, ASBC, WHITE %T e IR %T
Light source LED IR (850nm) and white LED (470nm)
Receiver Silicium photodiode
Sample cell ∅24mm - height 68mm, 20cc
Measurement of turbidity
Method / Measuring range EPA180.1 (0…2100 NTU)
ISO-NEPH (0…150 FNU)
EBC (0…37.5 EBC)
ASBC (0…9999 ASBC)
WHITE %T (0…100 %T)
IR %T (0…100 %T)
Resolution 0.01 NTU (0…9.99 NTU)
0.1 NTU (10.0…99.9 NTU)
1 NTU (100…2000 NTU)
Accuracy ±2% reading + 0.01 NTU (0…500 NTU)
±3% reading (500…1000 NTU)
±5% reading (1000…2000 NTU)
Repeatability ±2% reading or 0.01 NTU (the major one)
Security of memorized data
Date and hour real time schedule
Accuracy 1min/month max error
Measured values storing
Quantity 999 samples
Serial interface RS232C
Type RS232C electrically isolated
Baud rate Can be set from 1200 to 38400 baud
Data bit 8
Parity None
Stop bit 1
Flow Control Xon/Xoff
Serial cable length Max 15m
USB interface
Type 1.1 - 2.0 electrically isolated
Seriale interface DB9 connector (9- pole male)
USB interface USB connector type B
Mains adapter 2- pole connector (Ø5.5mm-2.1mm).
Positive at centre.
EMC standard regulations
Security EN61000-4-2, EN61010-1 level 3
Electrostatic discharge EN61000-4-2 level 3
Electric fast transients EN61000-4-4 level 3,
EN61000-4-5 level 3
Voltage variations EN61000-4-11
Electromagnetic interference
susceptibility IEC1000-4-3
Electromagnetic interference emission EN55020 class B