LC-pH-4S Keypad Benchtop pH Meter, 0.001 pH Resolution (CAT#: STEM-BC-3998-ZJF)

The LC-pH-4S is a high-resolution keypad benchtop meter for demanding pH, ORP, and temperature analysis. It is suitable for scientific research, quality control, biotechnology, fine chemicals, and precision titration. The 6.5-inch LCD and tactile keypad provide clear information and direct operation. The built-in microprocessor manages automatic calibration, temperature compensation, storage, and configurable functions. Selectable pH resolution down to 0.001 pH supports high-precision measurement. Digital filtering and sliding-difference processing improve response and data accuracy. The instrument automatically recognizes fifteen buffers from European and US, NIST, and Chinese series. One-, two-, or three-point automatic calibration can be performed according to the method. Three hundred data sets can be stored and transferred through USB or Bluetooth, while the IP54 enclosure protects against dust and splashes.

Power input: AC 220 V, 50 Hz or DC 12 V, 1000 mA
Display: 6.5-inch LCD
pH range: -2.000-19.999 pH
Selectable pH resolution: 0.1, 0.01, or 0.001 pH
Meter pH accuracy: ±0.001 pH
Complete-system pH accuracy: ±0.002 pH
Input current: ≤2 × 10^-12 A
Input impedance: ≥3 × 10^12 Ω
ORP range: -1999.9-1999.9 mV
Selectable ORP resolution: 0.1 or 1 mV
ORP relative accuracy: ±0.03% FS
Temperature measurement range: -5-105°C
Operating temperature range: 0-100°C
Temperature resolution: 0.1°C
Temperature accuracy: ±0.4°C from 5-60°C and ±0.8°C outside this range
Temperature compensation: Automatic or manual
Calibration: Automatic, up to 3 points
Data storage: 300 sets
Interfaces: USB and Bluetooth
Protection rating: IP54
Net weight: 550 g
Product dimensions: 215 × 175 × 35 mm

Ultra-high 0.001 pH resolution
±0.001 pH meter accuracy
Selectable ORP resolution
Automatic three-point calibration
Fifteen-buffer recognition
Advanced digital filtering
USB and Bluetooth data output
High-impedance measurement circuit

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