Portable Dissolved Oxygen Meter – HI9146

Quick Overview

Oksigen terlarut (dissolved oxygen, disingkat DO) atau sering juga disebut dengan kebutuhan oksigen (Oxygen demand) merupakan salah satu parameter penting dalam analisis kualitas air. Nilai DO yang biasanya diukur dalam bentuk konsentrasi ini menunjukan jumlah oksigen (O2) yang tersedia dalam suatu badan air. Semakin besar nilai DO pada air, mengindikasikan air tersebut memiliki kualitas yang bagus. Sebaliknya jika nilai DO rendah, dapat diketahui bahwa air tersebut telah tercemar. Pengukuran DO juga bertujuan melihat sejauh mana badan air mampu menampung biota air seperti ikan dan mikroorganisme. Selain itu kemampuan air untuk membersihkan pencemaran juga ditentukan oleh banyaknya oksigen dalam air. Oleh sebab pengukuran parameter ini sangat dianjurkan disamping paramter lain seperti kob dan kod.

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Portable Dissolved Oxygen Meter – HI9146 dirancang untuk memberikan presisi laboratorium dan akurasi dalam kondisi lingkungan dan industri yang keras. meteran ini menawarkan banyak fitur termasuk kalibrasi otomatis, deteksi auto-titik akhir, dan kompensasi untuk suhu, salinitas dan ketinggian. HI9146 yang disediakan lengkap dengan penyelidikan polarografi, topi membran PTFE, larutan elektrolit mengisi, dan tas kasar.

 

Features Portable Dissolved Oxygen Meter – HI9146 :

Polarographic Measuring System – The meter and probe use polarographic sensor technology based on the Ross and Clark polarographic measurement method. The probe is comprised of a platinum cathode and silver anode in an electrolyte solution held in place over the surfaces of the electrodes by a polymer membrane. An external voltage applied across the system establishes a current proportional to the concentration of dissolved oxygen.

Replaceable Membrane Caps – The pretensioned thin polytetrafluoroethylene (PTFE) membranes employ a screw cap design that can be changed quickly by simply filling with the HI7041 electrolyte fill solution and screw on the DO probe.

Automatic Calibration – Calibration can be performed at one or two points to 100% and/or 0% saturation. The 100% saturation is done in air while the 0% is done with the HI7040 bicomponent zero oxygen solution.

Good Laboratory Practice (GLP) – The Good Laboratory Practice feature allows the user to recall calibration information including date, time and calibrations points.

Automatic Temperature Compensation – All readings are automatically compensated for temperature variations with a high accuracy, built-in linearized thermistor temperature sensor behind a stainless steel cover.

Altitude Compensation – The HI9146 allows for altitude compensation for up to 4000 meters with a 100-meter resolution.

Salinity Compensation – Salinity compensation is adjustable from 0 to 80 g/L (ppt) with a 1 g/L resolution for the measurement of DO in brackish and sea water.

Auto End Point – The HI9146 features an auto endpoint mode in which, when selected, the reading will freeze on the display once a stable measurement is obtained. The auto-end feature allows for consistency among various users by ensuring that stability has been achieved before recording a measurement.

Backlit LCD – The HI9146 has a display with a backlight for easy viewing of readings in poor lighting conditions.

Battery Error Prevention System (BEPS) – The Battery Error Prevention System detects when the batteries become too weak to ensure reliable measurements. The backlight feature is automatically disabled when batteries are getting low and a clear indication is displayed to warn the user of this condition.

Nilai Kualitas Produk

SPESIFIKASI

DO Range0.00 to 45.00 ppm (mg/L), 0.0 up to 300.0% saturation
DO Resolution0.01 ppm (mg/L); 0.1% saturation
DO Accuracy±1.5% F.S. or ±1 digit, whichever is greater
DO Calibrationone or two points at 0% (HI 7040 solution) and 100% (in air)
Temperature Range0.0 to 50.0°C / 32.0 to 122.0°F
Temperature Resolution0.1°C / 0.1°F
Temperature Accuracy±0.2°C; ±0.4°F (excluding probe error)
Temperature Compensationautomatic from 0 to 50°C (32 to 122°F)
Altitude Compensation0 to 4000 m (resolution 100 m)
Salinity Compenstaion0 to 80 g/L (ppt) (resolution 1 g/L)
Electrode/Probepolarographic DO probe, internal temperature sensor, DIN connector
Battery Type/Life1.5V AAA (3) /approximately 200 hours of continuous use without backlight (50 hours with backlight on)
Environment0 to 50°C (32 to 122°F); RH max 95%
Dimensions185 x 72 x 36 mm (7.3 x 2.8 x 1.4”)
Weight300 g (10.6 oz.)
Ordering InformationHI9146 is supplied complete with HI76407 DO probe, HI76407A pre-formed PTFE DO membranes (2), HI7041S electrolyte solution (30 mL), batteries, instructions and rugged carrying case.

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