The GM700 series fixed multi-gas detector is a multi-parameter gas detection instrument developed by Gaan Technology based on years of experience in gas detector production, specifically designed to meet the needs of multi-gas combination detection. The product can be customized with 1 to 6 gas combinations as required by customers, with no restrictions on gas types or detection ranges. It operates on 24VDC (10–30VDC) power supply, provides 24-hour online monitoring, features automatic sound and light alarms for超標 levels, and can automatically聯(lián)動 devices via built-in relays. It supports RS485 digital signals or various transmission methods such as 4G, NB-IoT, and Lora. Optional functions include temperature and humidity detection, particulate matter detection, or pump-sampling. The GM700 fixed multi-gas detector has obtained relevant CPA type approval certificates, national explosion-proof certification, international SIL certification, and third-party metrology certificates.

The GM700 series fixed multi-gas detector uses an industrial-grade aluminum alloy explosion-proof housing, making it sturdy and durable. It features a 2.4-inch large screen that perfectly displays target gas, concentration, unit, indicator light status, and other parameters. When gas concentration exceeds the standard, it automatically triggers an alarm sound exceeding 90dB. It offers high accuracy, strong stability, and low error rates. Full-range temperature and humidity compensation ensures data stability during long-term operation.

Features of the Fixed Multi-Gas Detector

☆Flexible combination of 1–6 gases, supports over 500 types of detection

Compatible with over 500 types of flammable, explosive, toxic, and volatile gas detection. Allows任意 combination of 1–6 gases with no restrictions on technical principles or detection ranges.

☆User-friendly interface, perfectly displays monitoring data

2.4-inch high-definition color LCD screen實時 displays detected gas, unit, concentration value, temperature, humidity, alarm records, and other information.

☆Fast response, precise measurement, high accuracy

Full-range temperature and humidity compensation and data correction ensure long-term use in various environments.

Equipped with a 32-bit processing chip, capable of accurately detecting ppb-level concentrations comparable to analyzers.

☆Smart calibration, multi-level correction, excellent full-range linearity

Automatic zero-point calibration

Temperature and humidity compensation algorithm

Automatic baseline correction

Multi-level target point calibration

☆Multiple signal output options, diverse transmission methods

4–20mA signal: Standard 16-bit precision 4–20mA output chip

RS485 signal: Original imported RS485 communication chip using standard MODBUS RTU protocol

☆Flexible sampling methods, strong compatibility

A single gas chamber supports both natural diffusion and pipeline sampling, with upgrade options for pump-sampling.

☆Adaptable to harsh environments

Dual explosion-proof certifications: Ex db IIC T6 Gb; Ex tb IIIC T80℃ Db

IP68 protection rating, resistant to exposure, rain, acid, alkali, and corrosion.