Prepaid Gas meter STK25MI

STK25MI

The STK25MI is the diaphragm type prepaid gas meter based on the STK25MT which is the well matured smart gas meter and long seller for more than a quarter century in Japan. The STK25MI works as a normal diaphragm gas meter with several safety functions for post-pay use. The highlight of the STK25MI is the prepaid function with the embedded NFC card reader/writer. In combination with POS terminals, the Pre-Pay gas system is easily installed.

Specifications and drawings

OIML R137-1(2012)Certification

Model		STK25MI
Maximum flow rate (m³/h)		2.5
Absolute maximum pressure（kPa）		30
Maximum index (m³)		9,999.9999
Minimum index（L）		0.02
Cyclic volume（L）		0.7
Maximum pressure drop at maximum flow rate（Pa）		200
Error rate	Accuracy class	1.5
	0.016～0.25 m³/h（%）	＋/－3
	0.25～2.5 m³/h（%）	＋/－1.5
Meter body		Diecast aluminum
Dimensions（mm）	Height	251
	Width	141
	Depth	140
Span between inlet and outlet（mm）		90
Connection pipe		15A / 20A
Sensors	Seismic	Detect level 5 or stronger
	Gas pressure	Optional
	Leak	By flow measurement
Operating temperature（˚C）		－10 ～ 60
Storage temperature（˚C）		－20 ～ 70
Ambient temperature（˚C）		－10 ～ 60
Gas temperature（˚C）		－10 ～ 60
Gas flow direction		Left to right
Data logging		60×24＋366 points
Communication module		NFC card Reader/Writer module 3G/4G module (Optional) U-bus module (Optional)
LCD		7 digits and 12 indicators
Ingres Protection		IP66 (JIS C 0920)
Battery		Lithium Metal Battery
Estimated battery life		Longer than 10 years (depend on the conditions)

System configuration diagram

Prepaid gas meter system introduction example (Bangladesh)

Meter installation site

Card charge center

Charge to meter

Running project is click here.

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