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Table 1 Total cost of the developed methane monitoring system (US$ in 2019)

From: Assessment of the applicability of a low-cost sensor–based methane monitoring system for continuous multi-channel sampling

Component Units Unit cost ($) Subtotal ($) Total ($)
Methane monitoring and data acquisition
STC89C52RC 1 1.12 1.12  
ADS1115 1 2.73 2.73  
ESP8266-12E 1 1.79 1.79  
TGS 2611 1 35.84 35.84  
MQ-4 1 1.29 1.29  
SHT30 1 3.98 3.98  
LCD1602 1 2.12 2.12  
Components for gas sampling     
Three-way solenoid valves 5 2.55 12.75  
Vacuum pump (DC 12 V 6 W) 1 15.70 15.70  
Relay board 1 1.99 1.99  
Other components   5.00  
  84.31