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 Model 860067 DO Measuring Range 0.0%~200.0% DO Accuracy of % Scale ±3% of Full Scale DO Resolution 0.1% DO Measuring Range 0.0 mg/L~20.0 mg/L DO Accuracy ＜5mg/L: ±0.3 mg/L 5~20 mg/L: ±0.4 mg/L DO Resolution 0.1 mg/L Temperature Measuring Range 0~40.0℃ (32~104°F) Temperature Accuracy ±0.5℃ (0.9)°F Temperature Resolution 0.1℃ Auto Temp. Compensation 0.0~40.0℃ (32~104°F) Manual Compensation Included Salinity Adjustable Range 0.0~55.0 ppt Salinity Resolution 0.1 ppt Barometric Pressure Manual Compensation 50.0~115.0 Kpa Barometric Pressure Resolution 0.1 Kpa DO Calibration Points 0.0% and 100% LCD Size 54 (L)*32.5 (W) mm Operating Temperature 0~50℃ Operating RH% Humidity ＜85% Storage Temperature 0~50℃ Storage RH% Humidity ＜80% Sensor Life Time >1 year (with proper maintenance) Meter Size 169(L) * 78.3(W) * 43.4(H) mm Weight ~400g Battery AAA *6 PCS Power Consumption 10 hours operation Kit Includes Meter, Optical D.O. Probe, (6) AAA batteries, Hard Carry Case, Manual Downloads 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 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 √ √ √ √
