JCB4氣體檢測儀是一種便攜式甲烷檢測報警設(shè)備，廣泛適用于煤礦等存在甲烷氣體的危險環(huán)境。該設(shè)備采用催化燃燒式傳感器，測量范圍為0.00%~4.00% CH4，測量精度高，0.00%~1.00%時誤差范圍為±0.10%，1.00%~3.00%時誤差為真值的±10%，3.00%~4.00%時誤差為±0.30%。儀器具有聲光報警功能，報警聲級強(qiáng)度可達(dá)80dB，報警光能見度大于20米，能夠有效提醒工作人員及時采取措施。

JCB4氣體檢測儀采用堅(jiān)固的工程塑料外殼，防護(hù)等級達(dá)到IP54，可在0℃~40℃的溫度范圍內(nèi)以及濕度不超過98%的環(huán)境中正常工作。其尺寸為106mm×59mm×23.5mm，重量僅240g，便于攜帶。儀器配備3.7V可充電錳酸鋰電池，連續(xù)工作時間大于10小時，還具備電池電壓顯示和電量不足報警功能，確保設(shè)備在關(guān)鍵時刻不會因電量問題而失效。

此外，JCB4氣體檢測儀還具備多種輔助功能，如全量程可調(diào)節(jié)報警點(diǎn)、24小時時間顯示、零點(diǎn)調(diào)校、精度調(diào)校、時間調(diào)校和日期調(diào)校等，方便用戶根據(jù)實(shí)際需求進(jìn)行設(shè)置和校準(zhǔn)。目前，JCB4氣體檢測儀的市場價格一般在500元左右，性價比高，是保障煤礦等危險環(huán)境作業(yè)人員安全的重要設(shè)備。

The JCB4 gas detector is a portable methane detection and alarm device, widely used in hazardous environments with methane gas, such as coal mines. Equipped with a catalytic combustion sensor, it has a measurement range of 0.00% to 4.00% CH4. The instrument offers high measurement accuracy, with an error range of ±0.10% for 0.00% to 1.00%, ±10% of the true value for 1.00% to 3.00%, and ±0.30% for 3.00% to 4.00%. It also features audible and visual alarm functions, with an alarm sound level intensity of up to 80dB and a visible distance of the alarm light greater than 20 meters, effectively alerting workers to take timely measures.

The JCB4 gas detector is housed in a robust engineering plastic casing, with a protection rating of IP54. It can operate normally in an environment with a temperature range of 0℃ to 40℃ and a humidity level not exceeding 98%. The device is compact, measuring 106mm×59mm×23.5mm, and weighs only 240g, making it easy to carry. Powered by a 3.7V rechargeable manganese acid lithium battery, it has a continuous working time of more than 10 hours. Additionally, it features battery voltage display and low battery alarm functions, ensuring that the device will not fail due to battery issues at critical moments.

Moreover, the JCB4 gas detector comes with various auxiliary functions, such as adjustable alarm points across the entire range, 24-hour time display, zero adjustment, precision adjustment, time adjustment, and date adjustment. These features allow users to set and calibrate the device according to their actual needs. Currently, the market price of the JCB4 gas detector is around 500 yuan, offering high cost-effectiveness. It is an essential device for ensuring the safety of workers in hazardous environments such as coal mines.