Reliable DO readings at a reasonable price Measures dissolved oxygen to determine water quality in environmental testing, labs, industrial and municipal wastewater, aquariums and fish hatcheries. The back-lit display simultaneously displays dissolved oxygen (in % or mg/L) and temperature readings (in °C or °F). Automatic temperature compensation as well as manual compensation for salinity and altitude. Features simple one-button calibration to air. DO probe heads include built in membranes and screw on and off for easy replacement. Also functions as a pH, ORP, Conductivity, TDS or Salinity meter when used with the optional probes (sold separately). Comes in a hard carrying case complete with one DO probe, two spare probe heads, electrolyte, instructions and a 9V battery. EPA Equivalency Method: 360.1.Meter Dimensions: 7" × 2¾" × 1¼" (177 × 68 × 45 mm)Meter Weight: 16 oz (489 g)Kit Dimensions: 11" × 9½" × 2" (279 × 241 × 51 mm Specifications Unit of Measure: Range: Resolution: Accuracy: DO: 0 to 20 mg/L 0.1 ±0.4 O2 in Air: 0 to 100.0% ±0.7 Temperature: 0 to 50°C32 to 122°F ±0.8°C±1.5°F Downloads Instruction 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 √ √ √ √ Videos
