SL320 Portable pH/ORP/Ion/Temperature 4 in 1 Meter with USB Datalogger

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Place of Origin:
Shanghai, China
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Supply Ability:
3000 Piece/Pieces per Month
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Packaging Details
Carrying Case
Lead Time :
3-10 working days after we receive down payment

Multiparameter portable ion meter, 5 points calibration, automatic temperature compensation. The meter is suitable for measuring the pH, millivolts and ion concentration of liquids. Accuracy: 0.002pH, 1% full scale (Ion mode).

Ion Mode:
• Multiparameter portable ion meter is equipped with a large backlit LCD display.
• 2 to 5 points calibration including the eight concentration calibration points can be selected.
• Automatically recognize ion selective electrodes, does not need to specify type of ion.
• Direct ion concentration readout simplifies the elaborate measurement process.
• Selectable multiple concentration units for different measurement requirements.

pH Mode:
• 1 to 5 points push-button calibration with auto-buffer recognition.
• Selectable pH buffer standards (USA/NIST/DIN) or using the custom calibration solutions.
• Automatically calculates and displays electrode slope that helps you decide whether to 
replace pH electrode.
ORP Mode:
• Single point offset calibration allows adjusting the displayed value to a known standard.
• Relative and absolute millivolt measurements provide accurate ORP readings.

Other Features:
• Automatic Temperature Compensation ensures accurate reading over the entire range.
• Calibration Due Reminder prompts user to calibrate the meter regularly.
• Stability indicator automatically shows current measurement status.
• Auto-Hold function freezes stable measured value for easy viewing and recording.
• Manual temperature calibration improves the measurement accuracy of meter.
• Selectable temperature unit (°C or °F) meets different application requirements.
• Automatic electrode diagnosis shows zero point offset and slope of the electrode.
• Help message as a operational guide that helps you quickly begin using the meter.
• System menu allows setting the 10 parameters, including the pH buffer standards, number
of calibration points, resolutions, stability conditions, hold function, etc.
• Reset feature automatically resumes all parameters back to factory default options.
• Expanded memory stores and recalls up to 500 readings.
• Built-in real-time clock stamps stored data to meet GLP standard.
• Stored data can be transferred into computer by USB communication interface.
• Multi-mode power scheme (battery, power adapter, computer's USB port) ensures that use
the meter smoothly.











0.1, 0.01, 0.001pH

   Calibration Points

1 to 5 points

   Calibration Solutions

USA, NIST, DIN Standards

   Temperature Compensation

0~100°C, 32~212°F

   Compensation Mode

Manual or Automatic







0.1, 1mV

   Calibration Points

1 point (Only for Relative mV mode)

   Calibration Range




0.001~19999ppm, mg/L, mol/L


±0.5% F.S (Monovalent), ±1% F.S (Divalent)


0.001, 0.01, 0.1, 1

   Calibration Points

2 to 5 points

   Calibration Solutions

0.001, 0.01, 0.1, 1, 10, 100, 1000, 10000ppm, mol/L, mg/L



0~105°C, 32~221°F


±0.5°C, ±0.9°F



   Calibration Range

Measured value ±10°C

   Temperature Units

°C or °F


   Hold Function

Manual or Automatic

   Stability Conditions

Low or High

   Calibration Due

0 to 31 days

   Power Off

Manual or Automatic (10, 20, 30 minutes)

   Reset Function



Stores up to 500 data sets


USB Communication Interface



   Power Requirements

3×1.5V "AA" Batteries

   Battery Life

Approximately 150 hours (Turn off the backlit)






Order Information:

   Order Code



E201-BNC pH Electrode

TP-10K Temperature Probe 

pH Buffer Solutions (pH4.01/7.00/10.01)

AA Batteries

Carrying Case


P11 pH Electrode (Made in UK)

TP-10K Temperature Probe

pH Buffer Solutions (pH4.01/7.00/10.01)

AA Batteries

Carrying Case


Optional Accessories:

Order Code


P11 pH Electrode

For the general liquids

P11-LiCl pH Electrode

For the non-aqueous samples

P11-HA pH Electrode

For the photographic processing solutions

P11-NA pH Electrode

For the biofuel

P11-DW pH Electrode

For the low ionic strength samples

P12 pH Electrode

For the sample in the test tube

P13 pH Electrode

For the micro-volume samples

P14 pH Electrode

For the outdoor applications

P15 pH Electrode

For the low conductivity liquids

P16 pH Electrode

For the Tris buffers

P17 pH Electrode

For the semisolid samples (Flat Surface)

P18 pH Electrode

For the slurries

P19 pH Electrode

For the semisolid samples

P21 pH Electrode

For the the colloids

P22 pH Electrode

For high temperature measurements

501 ORP Electrode

Platinum pin

502 ORP Electrode

Platinum band

Na-US Sodium ISE

Range: 0.1~23000ppm

CL-US Chloride ISE

Range: 1.8~35500ppm

F-US Fluoride ISE

Range: 0.02ppm to Saturation

Ca-US Calcium ISE

Range: 0.02~40000ppm

NO3-US Nitrate ISE

Range: 0.4~62000ppm

Br-US Bromide ISE

Range: 0.4 to 79900ppm

NH4-US Ammonium ISE

Range: 0.1~18000ppm

Cn-US Cyanide ISE

Range: 0.2~260ppm

Cd-US Cadmium ISE

Range: 0.01~11200ppm

Cu-US Cupric ISE

Range: 0.006~6400ppm

I-US Iodide ISE

Range: 0.06~127000ppm

Pb-US Lead ISE

Range: 0.2~20700ppm

Ag-US Silver ISE

Range: 0.01~107900ppm

K-US Potassium ISE

Range: 0.04~39000ppm

S-US Sulphide ISE

Range: 0.003~32100ppm

Ion Calibration Solutions

Includes the 15 types of ion calibration solutions

pH Buffer Pouches (USA)


pH Buffer Pouches (NIST)


TP-10K Temperature Probe

Special-purpose sensor



   Order Code