Gas detection: toluene (C7H8)
• Detection principle:/Electrochemical principle/Photoion PID (optional)
Installation methods: wall mounted, pipe mounted (thread size: M40X1.5mm), flow-through, pump suction optional
• Measurement range: 0-10ppm, 20ppm, 50ppm, 100ppm, 500ppm, 1000ppm selection
Resolution: 0.1ppm 1ppm
Accuracy: ≤± 3%/≤± 1% (actual concentration, higher accuracy depends on the specific sensor)
• Repeatability: ≤± 1%
• Zero drift: ≤± 1% (F.S/year)
Response time: ≤ 20 seconds/10 seconds (T90) (depending on the sensor)
• Recovery time: ≤ 30 seconds/10 seconds
Output signal: Users can choose according to their actual requirements, with a maximum transmission distance of 2000 meters (single core 1mm ² shielded cable)
1. Three wire 4-20mA current signal output (two-wire system can be specially customized)
2. RS-485 digital signal output, national standard Modbus signal output
3. Dual relay signal output, one set of active DC24V output and one set of passive signal output
4. Alarm signal output: on-site sound and light alarm, alarm sound:<90 decibels
• Connection method: 3/4 "NPT internal thread
Shell material: die cast aluminum, explosion-proof, corrosion-resistant, and oxidation resistant
Explosion proof mark: ExdII CT6, Explosion proof certificate number: CNEx12.2576
• Protection level: IP65
• Working power supply: 24VDC
• Working temperature: -40~+70 ℃ (customized according to special requirements)
• Working humidity: ≤ 95% RH, no condensation (humidity>90% RH, can be equipped with a filter)
Work pressure: ≤ 200Kpa
• Size: 183 × 143 × 107mm
• Weight: 1.5Kg

The PN-2000-C7H8 toluene gas detector is suitable for continuous online detection of toluene gas concentration in various industrial and special environments. The instrument adopts imported sensor and microcontroller technology, and has the advantages of stable signal, high accuracy, and good repeatability. The explosion-proof wiring method is suitable for various hazardous areas. The instrument is compatible with various control alarms, PLCs, DCS and other control systems, and can achieve remote monitoring, remote control, remote alarm, computer data storage, analysis and other functions. It is widely used in petrochemical, industrial production, flue gas and exhaust environment monitoring, sewage treatment, biopharmaceuticals, home environmental protection, school laboratories and other fields.
Imported high-performance gas sensors with excellent anti-interference performance and a service life of over 3 years
The instrument has functions such as 4-20mA/RS485 signal output (national standard Modbus signal output (RS485 interface), relay output, data recovery, data storage (optional), etc. It can be equipped with software, connected to a computer, automatically generates curve graphs, views historical data, and the storage time interval can be set by oneself
On site backlit large screen multi parameter LCD display, visually displaying gas concentration, type, unit, working status, etc
● Independent chamber, no need for on-site calibration when replacing sensors, automatic identification of sensor key numbers
● Full range temperature digital automatic tracking compensation to ensure measurement accuracy
● Full software calibration function, users can also calibrate by themselves, achieved with 4 buttons, simple operation, graphic dot matrix pure Chinese operation menu LCD interface.
● Level 2 alarm setting, dual relay signal output: one set of active DC24V output, one set of passive signal output

Can be equipped with an infrared remote control, no need to open the cover to set parameters in explosion-proof places, to prevent danger caused by static friction when rotating the cover. The instrument and infrared remote control can receive up to 8 meters, ensuring safe and reliable operation