Product Features
pH / mV / Conductivity / Total Dissolved Solids / Salinity / Temperature
PC 450 accepts a single pH/Con probe or separate pH and conductivity probe
::    Durable waterproof and dustproof design with IP67 rating     
::    Switch between pH, mV, conductivity, TDS and salinity with a press of a button     
::    Large, backlit custom display – Lets you view measurement with temperature     
::    Grip-Clip™ – Quickly and easily secures separate pH and conductivity electrodes simultaneously to your sample container or beaker     
::    Calibrate up to 5 points automatically with USA or NIST buffer groups (up to 6 points with DIN). New manual option allows calibration with up to 5 custom buffer standards you     
::    Auto buffer recognition – Automatically identifies the correct pH buffer for rapid calibration     
::    Calibration due alarm – Set a visible reminder when it is time to recalibrate the meter     
::    Intuitive, user-friendly icons – Electrode status displays pH slope or cell constant      
::    Auto-range conductivity from 0 to 199.9 mS in five ranges – With up to five calibration points     
::    Selectable cell constant – 0.10, 1.00 or 10.0     
::    Adjustable temperature coefficient – From 0.00 to 10.00 % per ºC     
::    Conductivity-to-TDS factor – Adjustable from 0.40 to 1.00     
::    Selectable ºC/ºF – Choose units to best fit your application     
::    Ready indicator, manual or automatic measurement hold feature and optional automatic shutoff function     
::    Store up to 500 data sets; easy USB or RS232 output with optional data cables     
::    Built-in real-time clock stamps stored data and calibration data with time and date – Meets standards for GLP (Good Laboratory Practices)     
::    500 hours battery life or use optional universal power adapter
::    Built-in stand with wall-mount – Allows for easy benchtop measurement and storage

pH     
Range    -2.00 to 16.00 pH
Resolution    0.01 pH
Accuracy    ±0.01 pH
Calibration    
Up to 6 points: USA, NIST, DIN or custom
mV     
Range    ±2000 mV
Resolution    0.1 mV ±999.9 mV; 1 mV beyond
Accuracy    ±0.2 mV +2 LSD or +0.5 % of reading; whichever is greater
Calibration    ±200 mV
Conductivity     
Range    0 to 200 mS; 0 to 20 mS if using COMBI03BW probe
Resolution    0.01 µS to 0.1 mS
Accuracy    
±1 % full scale
Calibration    Auto/manual; one point per range
TDS     
Range    0 to 200 ppt (TDS factor 1.0)
Resolution    0.01 ppm to 0.1 ppt
Accuracy    ±1 % full scale
Calibration    Manual; 1 point/range
Temperature     
Range    -10.0 to 110.0 ºC (14.0 to 230.0 ºF)
Resolution    0.1 ºC/ºF
Accuracy    ±0.5 ºC; ±0.9 ºF
Calibration    Offset in 0.1 increments, ±10 ºC or ±18 ºF
Others     
Display    Custom LCD with backlight
Memory    Stores up to 500 data sets
Output    USB or RS232
Real-Time Clock    Time and date stamp on calibration and stored data
Temperature Compensation    Automatic or manual from -10 to 110 ºC
Power    Two AA batteries (included), >100 hours (without backlight); AC adapter (optional)
Dimensions (L x W x H)    
Meter: 7 7/8" x 3 1/8" x 2 1/4" (20 x 8.3 x 5.7 cm)
Boxed: 9 1/8" x 9 1/8" x 2 3/4" (23 x 23 x 7 cm)
Weight    Meter: 1 lb (0.5 kg)
Boxed: 1.4 lb (0.7 kg)