Meter DO Handheld DO8500

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State-of-the-art Optical DO sensor measures dissolved oxygen in a RELIABLE and EFFORTLESS manner

Minimal maintenance required. Quick and easy calibration

Automatic compensation for salinity, temperature& air pressure

GLP/GMP data management, 500 groups of data storage, USB data output

Comes with a complete test kit, including the meter, 3m optical probe and salinity probe, a calibration cap, and a rugged carrying case

Diameter of the probe cap for the DO803 Luminescent Optical DO Probe: approximately 3.3 cm

Intelligent Instrumentation:

Auto Temperature Compensation; Auto Air Pressure (barometric) Compensation; Manual Salinity Compensation
Large backlit LCD screen, simultaneously displaying dissolved oxygen reading and temperature. Easy switch from mg/L and % to ppm and %.
Advanced digital processing technology, supporting stable reading and auto-lock display modes.
IP67 Waterproof dust-proof rating allows the meter to be used in harsh environments.
The foldable stand allows use as a benchtop meter.
Cable Length: 3m
Comes with a rugged carrying case, which includes a Dissolved Oxygen Meter, an optical DO probe, and the accessories.
Diameter of the probe cap: approximately 3.3 cm

State of the art Luminescent Optical DO Sensor:

No Membrane, No Solution, No Hassle.
Quick & Accurate Measurements
The DO probe/tester/sensor does not consume oxygen. No limit on water flowing speed.
Maintenance-free. No need to calibrate before every use.
The service life of the luminescent cap is over 8000 hours. No need to replace the cap every year.
The special coating on the luminescent cap makes it anti-interference and unaffected by light and chemicals.
A calibration cap comes with the probe, which allows it to be calibrated and stored in saturated air.

Features and Benefits:

Technical Data (Meter):

DO	Dynamic Range	(0 to 20)mg/L (ppm), (0 to 200%)
	Resolution	0.01/0.1mg/L (ppm), 0.1/1%
	Accuracy	+/- 2% reading or +/- saturation whichever is greater
	Response Time	≤30 s (25℃ , 90% response)
	Calibration Points	Saturation Point & Zero Oxygen
	Temperature Compensation	Automatic, (0 to 50)℃
	Pressure Compensation	Automatic, (60 to 120) kPa
	Salinity Compensation	Manual, (0 to 45) ppt
Temperature	Range	0 to 50c
	Accuracy	+/- 0.5c
	Resolution	0.1c

Comparison Between Electrochemistry DO Sensor and Optical DO Sensor:

	Polarography or Galvanic DO Sensor	Optical DO Sensor
Measurement	Consume oxygen in measurement - Unstable measurements.	Adopts Fluorescence technologies, no oxygen being consumed during test - stable measurements.
Calibration	Serious electrode polarisation, frequent calibration is needed; calibration time consuming.	No polarisation; no need to calibrate frequently; only 2 minutes to calibrate.
Performance	Slow response, bad repeatability, low accuracy.	15 seconds response time, good repeatability, high accuracy.
Lifetime	Electrode membrane need to be frequently replaced; electrolyte need to be refilled; short life time.	No electrode membrane; no electrolyte; Service live > 8,000 hours.