Use the Model 52 in the field with the field-proven 5739 dissolved oxygen sensor and connect a 5905 BOD probe in the lab to complete all of your lab testing. It's as simple as changing cables!

The YSI 58 is a proven field and laboratory instrument. The 58 displays oxygen concentrations in two temperature-compensated modes. The instrument offers manual salinity correction, recorder output, and operation from line power or batteries. The case also holds additional batteries for an optional DO field stirrer.

• Portable
• Lab and field
• Rugged
• Works with a variety of YSI probes

 

Please visit our extensive dissolved oxygen resource page to learn about all things DO and BOD related; www.YSI.com/weknowDO

 

 

YSI 52 Instrument General Specifications

Dimensions	Size	8.5 by 11 by 3.75 in (21.6 by 28 by 9.5 cm)
	Weight	4.3 lbs  (2.4 kg)
Operating Environment		0 to 45°C, 10 to 90% humidity, non-condensing
Power		6 alkaline D-cells batteries, or an AC adapter (optional). Batteries power the instrument for approximately 100 hours.
Salinity Compensation		Range:  0.0 to 40.0 ppt Accuracy:  ±.02 mg/L
Temperature Compensation		The mg/L mode is automatically temperature-compensated to an accuracy of ±1% of DO readings between 0 and 5°C, and to an accuracy of ±0.6% of readings between 5 and 45°C. The % air saturation mode is automatically temperature-compensated to an accuracy of ±0.5% of calibration values between 0 and 5°C, and to an accuracy of ±0.3% of values between 5 and 45°C.
Water Resistance		With the probe receptacle capped, every case opening is has a gasket to resist the entry of water.
Warranty		2-year instrument

 

YSI 52 Specifications (Instrument Only)

	Range	Accuracy	Resolution
Dissolved Oxygen (%)	0 to 199.9% air saturation	±0.1% of air saturation, plus 1 Least Significant Digit for % readings, plus probe error	0.1% air saturation
Dissolved Oxygen (mg/L)	0 to 19.9 mg/L	±0.1% of saturation value, plus 1 Least Significant Digit for mg/L readings, plus probe error	0.1% of the saturation value, expressed in mg/L, or 0.01 mg/L , whichever is greater
Temperature	-5 to 45°C	±0.1°C, plus probe error	0.1°C

 

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YSI 58 Instrument General Specifications

Medium		fresh, sea, or polluted water and most other liquid solutions
Mode to Mode Accuracy (mg/L to % air saturation)		+ 0.5% of reading, + 2 least significant digits (in the 0.01 mg/L mode)
Power		4 D-size Alkaline Batteries (included) Approximately 1000 hours operation from each new set of batteries. Low battery indicator signal (LOBAT) appears automatically when approximately 50 hours of battery life remain.
Recorder Output	Voltage	0 to 1 volt, full scale
	Accuracy	+ 0.4 % of full scale, + 1 least significant digit (in the 0.01 mg/L mode)
	Minimum Load Impedance	50 K OHM
Salinity Compensation	Range	0.0 to 40.0 ppt
	Accuracy	+ 0.3% of reading + 1 digit
Temperature	Operating	0 to +45 °C
	Storage	0 to +45 °C
Temperature Compensation		The mg/L modes are automatically temperature compensated to an accuracy of + 1% of the dissolved oxygen reading between 5 and 45°C; and to an accuracy of +2% between 0 and 5. °C. See Temperature Sensitivity in probe specifications.
Water Resistance		With RECORDER OUT, BATT ELIM and STIRRER receptacles capped,  every case opening is splash resistant.
Warranty		2-year instrument

 

YSI 58 Specifications (Instrument Only)

	Range	Accuracy	Resolution
Dissolved Oxygen (%)	0 to 200% air saturation	+0.3% Air Saturation	0.1% air saturation
Dissolved Oxygen (mg/L)	0 to 20 mg/L	0.03 mg/L	.01 mg/L
Temperature	-5 to 45°C	± 0.3 °C, plus probe interchangeability	0.1°C

 

 

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Probe Specifications for:
YSI 5239
YSI 5718
YSI 5739
YSI 5750
YSI 5905

Dissolved Oxygen Accuracy		± 0.1 mg/L or ± 2% of reading, whichever is greater
Electrolyte	5739, 5718, 5750	KCl with Kodak Photo-Flo
	5905, 5239	KCl with NA2SO4
Membrane Material	5905	FEP Teflon Cap
	5239, 5718, 5739, 5750	.001” FEP Teflon Film .0005” FEP Teflon available, YSI 5776
Pressure Compensation		Effective 0.5% of reading with pressures to 100 psi (230 feet of seawater)
Polarizing Voltage		0.8 volts nominal
Probe Current	Air at 30°C	19 microamps nominal
	Nitrogen at 30°C	15 microamps or less
Probe Response Time	5905	Typical response to a step change in dissolved oxygen at 20°C is 90% of the change in 30 seconds.
	5239, 5718, 5739, 5750	Typical response for temperature and dissolved oxygen readings is 90% in 10 seconds at a low constant temperature of 30°C with the 5775 membrane. DO response and low temperature and low DO is typically 90% in 30 seconds. YSI 5776 High Sensitivity membranes may be used to improve response at low temperature and DO concentrations.
Sensor Materials	Cathode	Gold
	Anode	Silver
Temperature	Accuracy	+ 0.2°C
	Operating  Range	0° to 45°C
	Sensitivity	When measuring oxygen, the probe output current increases approximately 3.5% per 1°C of increase in temperature. The circuitry automatically compensates for this effect in a typical probe. However, the exact temperature sensitivity of an individual probe may vary slightly according to its condition. Therefore, a probe should be calibrated at a temperature close to the measurement temperature in order to minimize the possible effect of such variation.
Warranty		1-year

Manuals

58 Dissolved Oxygen Meter Operations Manual

5905, 5010, 200-BOD, and Pro-BOD Probe Instruction Manual

5239 Dissolved Oxygen Probe Instruction Manual

52 Dissolved Oxygen Meter Operations Manual

Specification Sheets

YSI 5905 and 5010 BOD Probes

YSI 5905-W and 5010-W Wine Bottle Oxygen Probes

Catalogs & Brochures

Water Quality Sampling for Field and Laboratory

Technical Notes

How to Ensure Accurate and Successful BOD Measurements