The Sper Scientific Optical Dissolved Oxygen (DO) Meter is an ideal tool for low-maintenance dissolved oxygen measurement.

It delivers accurate results even in low oxygen ranges and remains unaffected by acid gases, ensuring reliable performance in challenging environments. With no polarization time or probe maintenance required, this DO meter offers unparalleled ease of use.

The large, easy-to-read LCD screen simultaneously displays both dissolved oxygen and temperature, with the flexibility to choose between % and mg/L units for DO measurements. Equipped with built-in automatic temperature compensation (°C/°F), the device also supports manual salinity and pressure compensation for enhanced precision. Additionally, 2-point DO calibration is available, further ensuring accurate measurements every time.

Perfect for professionals who need efficient and reliable DO monitoring without the hassle of frequent upkeep.

• Great for low maintenance D.O. measuring work
• Remain accurate in low oxygen range and won’t be affected by acid gases
• No polarization time and no probe maintenance work
• Large LCD with D.O. & Temperature Display
• Selectable % and mg/L unit for D.O. Value
• °C/°F Automatic Temperature Compensation Built-in
• Manual Salinity and Manual Pressure Compensation
• 2 Points D.O. Calibration Available

The Optical DO Meter's precision and low maintenance design make it a highly versatile tool for a variety of industries:

• Aquaculture: The Optical DO Meter ensures optimal conditions for fish and other aquatic organisms, with fisheries and aquaculture farms using it to maintain the health of aquatic life.
• Environmental Monitoring: The Optical DO Meter is used for measuring dissolved oxygen in rivers, lakes, and oceans to assess water quality.
• Pharmaceuticals: In bioreactors, precise DO control is necessary for cell culture growth.
• Food and Beverage: Especially important for those involved in brewing beer or fermenting other products.
• Wastewater Treatment: The Optical DO Meter monitors the DO value during the treatment process, which is crucial for the breakdown of biological waste.
• Brewing and Fermentation: The Optical DO Meter controls oxygen levels during fermentation, affecting the taste and quality of the final product.

Complete Kit Includes: Meter, Optical D.O. Probe, (6) AAA batteries, Hard Carry Case and Instructions.

Specifications

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Users Manual

 
Product Brochure

Comparison Chart

Compare Sper Scientific Dissolved Oxygen (DO) Meters

Model Number	850045	850048DOK	850081DOK	860055	860067	860073
Product Name	Waterproof DO Meter Pen	Combination Water Meter Kit w/ DO Probe	Dissolved Oxygen Meter Kit	Rechargeable DO Pen w/ 5 Meter Cable	Optical Dissolved Oxygen Meter	Portable Optical Dissolved Oxygen Meter
DO Range (% Saturation)	0–100% O₂ in air	0–200%	0–100.0%	0.0–199.9%	0.0–200.0%	0-200%
DO Range (mg/L)	0–20.0 mg/L	0–20.0 mg/L	0–20 mg/L	0.00–20.00 mg/L	0.0–20.0 mg/L	0 -20 mg/L
DO Accuracy (mg/L)	±0.4 mg/L	±0.4 mg/L	±0.4 mg/L	±0.4 mg/L	<5: ±0.3 mg/L≥5: ±0.4 mg/L	±0.3mg/L
DO Resolution (mg/L)	0.1 mg/L	0.1 mg/L	0.1 mg/L	0.01 mg/L	0.1 mg/L	0.01mg/L
DO Accuracy (%)	±0.7% O₂	±2% F.S.	±0.7% O₂	±3% F.S.	±3% of Full Scale	±3%
DO Resolution (%)	0.10%	0.10%	0.10%	0.10%	0.10%	0.10%
Temp. Range	0–50°C / 32–122°F	0–50°C / 32–122°F	0–50°C / 32–122°F	0–50.0°C / 32–122°F	0–40.0°C / 32–104°F	0°–45°C / 32°–113°F
Temp. Accuracy	±0.8°C / 1.5°F	±0.5°C / 0.9°F	±0.8°C / ±1.5°F	±0.5°C / 0.9°F	±0.5°C (0.9°F)	±0.5°C / 0.9°F
Temp. Resolution	0.1°C	0.1°C	0.1°C	0.1°C	0.1°C	0.1°C
Auto Temp. Comp. (ATC)	√	√	√	10–40°C	0–40°C	√
Salinity Resolution				0.1 ppt	0.1 ppt
Barometric Pressure Comp.		Manual (altitude)	Manual (altitude)	500–760 mmHg(66.7–101.3 kPa)	Manual, 50–115 kPa	Manual (altitude)
DO Calibration	1-Point (air)	1-Point (air)	1-Button (air)	1-Point (100% air)	2-Point (0% & 100%)	2-Point (0% & 100%)
Probe Technology	Polarographic DO probe	Polarographic DO probe	Polarographic DO probe	Polarographic DO probe	Optical (fluorescent) DO probe	Optical (fluorescent) DO probe
Sensor Warmup Time	~30 min (cal.)	~30 min (cal.)		<60 seconds	None	~10 min (cal.)
Sensor Response Time				<30 seconds	Fast
Sensor/Probe Lifetime				>6 months	>1 year	>1 year
Measures pH		(optional probe)	(optional probe)
Measures ORP / mV			(optional probe)
Measures Conductivity/TDS		(optional probe)	(optional probe)
Measures Salinity	Via compensation	(optional probe)	(optional probe)	Via compensation	Via compensation	Via compensation
Memory / Data Storage	Max/Min record	99 memory points			99 memory points	+100,000 memory points
RS232 / Data Output			RS232			USB
Display Type	Dual LCD	Large backlit LCD	Backlit LCD	Backlit LCD	Large LCD	Large LCD
Simultaneous DO & Temp.	√	√	√	√	√	√
Backlight		√	√	√		√
Battery Type	(4) AAA	(4) AAA	9V	3.7V 500mAh Rechargeable Li-ion	(6) AAA	Rechargeable Li-ion
Charging				USB Type-C(~1.5 hr)		USB
IP Rating	IP-67				IP-67	IP-67 Housing / IP-68 Sensor
Spare Probe Heads	2 spare probe heads	2 spare probe heads	2 spare probe heads	2 spare probe heads
Electrolyte Solution	√	√	√	√