This document describes the features and characteristics of Extech's pH, mV, and temperature meter, including measurement range, resolution, and accuracy.
The Extech Model 407227 is a professional Heavy Duty pH, mV, and Temperature Meter featuring an automatic or manual temperature compensation system. It includes dual-function LCD display with contrast adjustment and supports various pH electrodes via BNC connector.
The device allows for RS-232 PC interface connectivity using Extech Data Acquisition Software (Part Number 407001) to record data. Key features include memory recall for MAX, MIN, and AVG readings, as well as an automatic power-off function that can be disabled during recording modes.
| Display Type | Dual function LCD with contrast adjust |
|---|---|
| Input Impedance | 1012 ohms |
| pH Measurement Range | 0 to 14 pH |
| mV Measurement Range | ±1999 mV |
| Temperature Range (°C) | 0 to 50°C / 50 to 65°C |
| Power Supply | 9V battery |
| Weight | 0.59 lbs / 270g (including batteries) |
Select 'pH ATC' on the front panel slide-switch and plug the supplied thermometer into the meter's temperature sensor input jack.
An external thermometer separate from the one supplied with the meter is required.
No, calibration is not required for the ORP function.