Orion Star A3235 Dissolved Oxygen Meter Kit (Thermo Scientific)

Meter kit includes: RDO probe w/3m (10 ft.) cable (087010MD), Protective armor with electrode holder, Hard carrying case, 4 AA batteries

  • Accepts and automatically recognizes Orion Polarographic and RDO optical/luminescence-based probes
  • Calibrate using water-saturated air, air-saturated water, a Winkler titration or zero point calibration
  • Large, backlit LCD display shows dissolved oxygen in percent saturation or concentration with temperature and electrode status, time, date, sample ID, user ID and calibration points
  • Includes plain language screen prompts, soft keys for easy selection and a multi-language interface
  • AUTO-READ™ locks in the stable reading on your screen, ready indicator alerts when readings are stable and timed reading gathers data in specific time intervals
  • Four AA batteries (included) provide over 800 hours of operation or available universal power adapter (sold separately) to use AC power
  • Non-volatile memory holds up to 5000 data points with time and date stamp
  • Easily transfer data and keep meter software up-to-date with the USB and RS232 ports and complimentary data analysis software


Accuracy (Polarographic DO) ±0.2 mg/L; ±2 % saturation
Accuracy (RDO) ±0.1mg/L up to 8mg/L, ±0.2mg/L from 8 to 20mg/L, 10% of reading from 20 to 50mg/L; ±2 % saturation
Battery Life 800 hours
Battery Type Four AA (included)
Data Points 5000
Display Type Graphic LCD with backlight
Inputs 9-pin Mini-DIN (RDO or Polarographic DO with temperature probe)
IP Rating IP-67
Outputs USB, RS232
Range (Polarographic DO) 0 to 90 mg/L; 0 to 600 % saturation
Range (RDO) 0 to 50 mg/L; 0 to 500 % saturation
Relative Humidity Range 5 to 85 %, non-condensing
Resolution (Polarographic) 0.01, 0.1 mg/L; 0.1, 1 % saturation
Resolution (RDO) 0.01, 0.1 mg/L; 0.1, 1 % saturation
Salinity Factor 0 to 45ppt
Saturation Range 0 to 600 % Saturation (Polarographic); 0 to 500 % Saturation (RDO)
Saturation Resolution 0.1, 1% Saturation
Saturation Temperature Range 23° to 221°F
Sensor Types Polarographic or RDO (optical) DO probe (included)
Temperature Range 23 to 221°F 5 to 45°C / -5 to +105°C ± 0.1°C
Warranty 3 year meter replacement
Certifications/Compliance CE, TUV, FCC Class A limits
Electrical Requirements 90 to 260VAC 50/60Hz
Description/Item No. Details Mfr. Item No. Your Cost/Qty Purchase
Dissolved Oxygen Meter Kit
3801-02
Meter Kit includes: See below STARA3235
List Price $1,727.00/EA
Buy 1 $1,467.95/EA
Buy 2 $1,347.06/EA
Sign in to Buy This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you?d like us to keep stock in the future In Stock
Replacement RDO probe
3801-03
Replacement RDO probe 087010MD
$804.00
$659.28/EA
18% discount
Sign in to Buy This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you?d like us to keep stock in the future In Stock
Polarographic Probe
3801-04
Optional Polarographic probe 081010MD
$550.00
$451.00/EA
18% discount
Sign in to Buy This item is not currently stocked. Allow 1-2 weeks. Please call us at 800-328-8378 if you?d like us to keep stock in the future In Stock