4 in 1 Portable 2.31in LCD CO HS O EX Safety Siren Gas Detector Alarm Monitor Tester Description: 　　PLT400 portable four-in-one gas detection alarm is used for portable rapid detection of multiple gas concentrations, temperature and humidity measurements, and the occasion of exceeding the standard alarm. Adopts 2.31 inch HD color screen, well-known brands of gas sensors. The main detection principles are electrochemical, infrared, catalytic combustion, thermal conductivity, and PID photoion, with advanced circuit design, mature kernel algorithm processing. Can also detect gas concentrations of pipelines, confined spaces, atmospheric environments, high concentration single gas purity of nitrogen or oxygen, and gas leakage, with over 500 kinds of gas detection.  Features: Large-capacity data storage function: standard 100,000 data storage capacity, support real-time storage, timed storage, or only store alarm concentration data and time. Support the machine to view, delete data, upload data to the computer through the USB interface,  and analyzes data, storage, printing by PC software. Switched three display modes: Simultaneously display of four gas concentrations, single channel gas concentration, and real-time curve. Switched automatic cycle and manual cycle between channels. Set whether to display the maximum value, minimum value, gas name, and view the history graph. Waterproof, dustproof, explosionproof, and shockproof function: Intrinsically safe circuit design, anti-static, anti-electromagnetic interference. Protection level reaches to IP65, with built-in water steam, dust filter to prevent damage to sensors and instruments from moisture and dust. HD 2.31 inch color display: Display real-time concentration, alarm, time, temperature, humidity, storage, communication, power, charge status, etc. The menu interface uses the high-definition simulation icon, to display the function name of each menu. Chinese and English interface can be switched, with default Chinese interface, simple Chinese or English operation prompt. 8 auxiliary functions: Data recovery function, can be selectively restored or completely restored, eliminating the worries caused by misuse. Automatically recognize and prevent the wrong concentration, to avoid the influence of human action. Automatic tracking: automatic tracking, not affected by the source shift in long-term use. Three-level Target calibration, guarantee the linearity and precision of the measurement, to meet the standards of national standards and local metrology bureaus. Log reminder:  Can record calibration log, maintenance log, troubleshooting, sensor life span expiration reminder, second concentration calibration time reminder. Extended boot: Real-time detection or timing detection(for the relatively small amount of gas ), can turn off the pump to extend the boot time when not detecting. Specifications: Material: ABS plastic Color: as picture shown Detection Gas: CO, H2S, O2, Ex Detection Range: CO (1000ppm), H2S (0~-100PPM), O2 (0~30% Vol), Ex (0~100%LEL) Resolution: CO (0.1ppm), H2S (0.01ppm), O2 (0.01% Vol), Ex (0.1% LEL) Detection Principle: Electrochemistry, catalytic combustion, infrared, thermal conductivity, semiconductor, PID photoion Detection Accuracy: ≤ ± 3% (F.S) Linearity: ≤±2% Repeatability: ≤±2% Response Time: ≤ 20S Working Power: DC 3.6V Package List: 1 * Gas Detector 1 * Data Line 1 * Filter Tip  1 * Case