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product arrow Orion* 4-Star Plus pH/Conductivity Benchtop Multiparameter Meter

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Orion* 4-Star Plus pH/Conductivity Benchtop Multiparameter Meter

  • Thermo Scientific* Orion benchtop pH/conductivity multiparameter meter displays two parameters plus temperature at once.
  • Dual-channel, dual-display pH/conductivity meter for reliable, accurate measurements in soil and water analysis applications.

Part Number Description
1117000 Orion 4-Star Plus pH/Conductivity Meter Only
1117001 Orion* 4-Star Plus pH/Conductivity Meter Kit with Solutions. Includes pH/ATC Triode electrode; DuraProbe* conductivity cell; pH electrode storage solution; pH 4, 7, and 10 buffers; 1413 µS/cm conductivity standard; and swin
1117201 Orion 4-Star Plus pH/Conductivity Meter and Probes (includes pH/ATC Triode™ electrode; DuraProbe™ conductivity cell and swing arm electrode stand)

Model Orion 4-Star Plus pH/Conductivity Benchtop Multiparameter Meter
pH Mode
Range -2.000 to +19.999pH
Resolution 0.1/0.01/0.001pH
Relative Accuracy ±0.002pH
Calibration Points AUTO-CAL* and/or Manual Calibration; 1 to 5 points; US/NIST, DIN, and custom buffers recognized
mV/RmV/ORP Mode
Range ±1999.9mV
Resolution 0.1mV
Relative Accuracy ±0.2mV or 0.05%, whichever is greater
Calibration Points EH autocalibration to standard hydrogen electrode for ORP measurements
Conductivity Mode
Range 0.000 to 3000mS/cm, auto resolution with cell constant dependence
Resolution 4 signi?cant digits down to 0.001µS/cm, cell constant dependent
Relative Accuracy ±0.5% ± 1 digit or 0.01µS/cm, whichever is greater
Cell Constants 0.001 to 199.9cm-1
Cell Compatibility Planar Conductivity Cell; pH glass membrane; ISFET solid-state electrode
Calibration Points DirectCal*/AUTO-CAL*: 1 to 5 points/1 to 3 points
Resistivity Mode
Range 0.0001 to 100Megohm
Resolution Autoranging
Relative Accuracy ±0.5% ± 1 digit
Salinity Mode
Range 0.1 to 80.0ppt NaCl equivalent; 0.1 to 42ppt practical salinity
Resolution 0.1ppt
Relative Accuracy ±0.1ppt ± 1 digit
TDS Mode
Range 0 to 19,999mg/L
Resolution 1mg/L
Relative Accuracy ±0.5% ± 1 digit
Adjustable TDS Factor 0.00 to 10.00%
Reference Temperature 5°C, 10°C, 15°C, 20°C or 25°C (default); autoranging
Temperature Mode
Range -5° to +105°C
Resolution 0.1°C up to 99.9°C, 1.0°C over 99.9°C
Relative Accuracy ±0.1°C, ± 1 digit
Temperature Compensation Conductivity, nLF, linear; pH, auto/manual -5° to +105°C
Display Custom LCD; simultaneous display of selected measurement and temperature, pH calibration points, and current electrode condition
Inputs 8-Pin Mini-DIN Locking for Conductivity or ATC probe; BNC for pH or ORP electrode; Pin tip for separate reference electrode; Phono jack for stirrer
Sensor Types 2 Cell, 4 Cell, or Planar Conductivity Cell; pH or ORP electrode
Outputs Bidirectional RS-232, stereo jack, optional USB interface cable
Data Management GLP Electrode Veri?cationSaves 750 points by time, stability or manual read with time/date stampCalibration log of last 10 calibrationsUser method storage for 10 proceduresAdvanced self-test and diagnostics routinesPassword protectionDownloadable software and methods updates via Internet
Compliance Meets all U.S. Pharmacopeia (USP) requirements; 21 CFR Part II Compliant with optional software
Certifications CE, CSA, UL, TUV, FCC Class A limits
Environmental Operating Conditions
Ambient Operating Temperature 5° to +45°C
Relative Humidity 5 to 85% noncondensing
IP Rating IP54 compliance: splashproof and dustproof
Stability SMART STABILITY* and SMART AVERAGING*: Resolution dependent/automatic
Power Supply Universal AC power adapter or 4 x 1.5V AA (optional)
Warranty Period Three years from date of purchase