The metering unit shall be designed to withstand the climatic 
condition as specified below:

Maximum relative Humidity                            : 100%
Annual mean Relative Humidity                      : 75%
Minimum ambient Temperature                       : 5oC
Maximum  ambient Temperature                      : 40oC
Mean annual Rainfall                                         : 1500 3000 mm
Maximum wind pressure                                    : 150 Kg/sq.m
Maximum Altitude above sea level                    : 300 meters
Average isokeraunic level                                   : 80 days per year
Pollution of ambient air                                       : dust, salt, chemical
The climate is humid and tropical.
Maximum humidity and temperature occur simultaneously.
Ambient temperature variation + 5o (Forty-five) Celsius.

Note: The mater shall be designed in such a way that the LCD display of 
the meter is compatible to environment of Bangladesh.