Specifications
AC AdapterUniversal 50-60 Hz, 100-240 VAC power adapter (sold separately, Cat. No. 1010003)
Accuracy (Conductivity)0.5% of reading ±1 digit > 3 μS; 0.5% of reading ±0.01 μS ≤ 3 μS
Accuracy (Resistivity)0.5% of reading ±1 digit
Accuracy (Salinity)0.5% of reading ±1 digit
Accuracy (TDS)0.5% of reading ±1 digit
Accuracy (mV)±0.2 mV or ±0.05% of reading whichever is greater
Accuracy (pH)±0.002
Alarm OutputHigh/low limit alarm, calibration due alarm
Backlight OptionYes (Selectable)
Battery Life800 hr.
Battery Type4 AA (included)
CalibrationpH with calibration editing option, relative mV (RmV), ORP, conductivity with calibration editing op
Calibration Points1 point relative mV (RmV) mode, 1 point ORP mode
Calibration Points (Conductivity)Up to 5
Calibration Points (pH)1 to 5
Cell Constant0.001 to 199.9cm-1
Certifications/ComplianceCE, TUV 3-1, FCC Class A
Data Management DetailsTransfer single, range or all data points to printer or computer
Data Points5000 with Date and Time Stamp
DescriptionOrion Star A325 pH/conductivity portable meter
Dimensions (L x W x H)24cm x 10cm x 6.5cm (9.5 in. x 3.9 in. x 2.6 in.)
IncludesStar A325 pH/conductivity meter, 4 AA batteries, literature CD, printed quick start guide, computer interface cable and meter test certificate
InputsBNC (pH or ORP electrode), pin-tip (reference electrode), 8 pin MiniDIN (conductivity sensor with built-in temperature or ATC temperature probe)
Isopotential Point7.000pH
KeypadComprehensive with menu-specific function keys and dual purpose scroll/shortcut keys
LanguagesEnglish, Spanish, French, Italian, German and Chinese; Portuguese and Korean available with software update
Log Function TypeAutomatic data logging with Auto-Read and Timed measure modes; manual data logging with Continuous m
MemoryNon-volatile memory preserves data log, calibration log and meter settings
Methods10 per channel with password protection
ModelOrion Star A325 pH/mV/RmV/ORP/Conductivity/TDS/Salinity/Resistivity/Temperature Portable Meter
OutputsUSB, RS232
Power Supply4 AA batteries (included) or universal AC adapter (sold separately)
Product TypePortable Meter
Range (ORP)±2000.0 mV
Range (Relative mV)±2000.0 mV
Relative Humidity Range5 to 85 %, non-condensing
Resolution (Conductivity)0.001 μS minimum, auto ranging up to 4 significant digits
Resolution (Resistivity)1 ohm or 0.1 meg-ohm, auto ranging
Resolution (Salinity)0.01 psu or 0.01 ppt minimum, auto ranging
Resolution (TDS)0.001 ppm minimum, auto ranging up to 4 significant digits
Resolution (mV)0.1mV
Salinity Measurement ModesPractical salinity (psu) or natural sea water (ppt)
StabilitySelectable fast, medium, slow or Smart Stability setting; Selectable off or Automatic Smart averaging setting
TDS Factor RangeLinear (0.02 to 9.99)
Temperature Accuracy±0.1°C
Temperature CompensationLinear, nLFn (non-linear ultra pure water), nLFu (non-linear ultra pure degassed water), EP (off with warning) or off
Temperature (English) Operating41°F to 113°F (ambient)
Temperature (Metric) Operating5°C to 45°C (ambient)
Temperature (Metric) Reference5, 10, 15, 20, 25°C
Temperature Probe Calibration1 point temperature offset calibration
Temperature Range (English)22.0°F to 221.0° F
Temperature Resolution0.1°C, 0.1°F
Temperature SelectionManual or automatic with ATC temperature probe
Warranty3 Year Meter
Weight (English)1.2 lb.
Weight (Metric)0.5 kg
Channels2
Display TypeLCD Graphic, Backlit
IP RatingIP67
Measurement ModespH, mV, Relative mV, TDS, ORP with Temperature, Salinity, Conductivity, Resistivity with Temperature
Range (Conductivity)0.001 μS/cm to 3000 mS/cm
Range (Resistivity)2 ohm to 100.0 meg-ohm
Range (Salinity)0.06 to 80.00 psu, 0.05 to 42.00 ppt
Range (TDS)0.001 ppm to 200.0 ppt
Range (mV)±2000.0 mV
Range (pH)-2 to 20
Resolution (pH)0.1/0.01/0.001
Temperature Range (Metric)-5.0°C to +105.0°C
Unit SizeEach