The LM PH-401 is a portable pH meter that measures pH, mV, and temperature, supporting up to a 3-point calibration and storing 100 data sets. It features a custom LCD display, USB connectivity for data transfer, and is designed for use in various applications including food and beverage analysis and hydroponics. With a temperature range of 0 - 105°C and automatic temperature compensation, the device ensures accurate readings in diverse environments.

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Portable pH Meter LMPH-
401

2. Overview
Portable pH Meter LMPH-401 is a versatile device that can monitor pH,
mV and temperature when paired with the respective probe. It is an
ideal meter for a wide range of applications and advanced pH
analysis in the field. Performs up to a 3 points calibration and stores
100 data point sets and easily transfer calibration and data logs via
USB. The parameters operating within 0 - 105°C temperature range
are displayed on a custom LCD.
Specifications :
pH
Range -2.00 - 20.00 pH
Resolution 0.01pH
Accuracy
Calibration
Points
1 to 3 points
pH Buffer
Options
USA (4.01/7.00/10.01),
NIST (4.01/6.86/9.18)
ORP
mV Range ±1999mV
Resolution 1 mV
Accuracy ±1 mV

3. Temperature
Range 0 - 105°C/32 - 221°F
Resolution 0.1°C/0.1°F
Accuracy ±0.5°C/±0.9°F
Offset
Calibration
1 point, reading
±10°C
Temperature Compensation 0 - 100°C, manual or automatic
Slope/Offset Display Yes
Hold Function Manual or auto-endpoint
Auto-Off 30 minutes after last key pressed
Memory 100 data sets
Communication Interface USB
Connector BNC, 3.5 mm jack socket
Display Custom LCD (80 × 60 mm)
Battery Life Approximately 150 hours (Turn off
the )backlight
Power Requirements 3 1.5V AA batteries or DC5V power
adapter
Dimensions (L×W×H) 170×85×30 mm
Weight 300 g
Features :
- 1 to 3 points calibration with automatic recognition for USA and NIST
buffers
- Automatic electrode diagnosis helps user decide whether to

4. replace the pH electrode
- Automatic temperature compensation ensures accurate readings
over the entire range
- Auto read function senses and locks the measurement end point
- Setup menu allows setting the pH buffer set, number of calibration
points, temperature unit, auto-power off, etc
- Reset function automatically resumes all setting back to the factory
defaults
- Expanded memory stores or recalls up to 100 data sets
- USB communication interface for data transfer or connecting a
power adapter to meter
- Auto power off effectively conserves battery life
- Ensures durable, rugged performance in outdoor environments
Applications :
pH meters are vastly used in various applications such as food and
beverage industries, analysis of quick nutrients availability,
hydroponics, pH measurement of soil and other soluble solutions.
Labmate Scientific
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