Residential Ultrasonic Gas Meter
USM-RA-G1.6/G2.5/G4, USM-RS-G1.6/G2.5/G4Gas Meter(USM-RA-G1.6/G2.5/G4, USM-RS-G1.6/G2.5/G4)

USM Series Ultrasonic Gas Flow Meter is a type of electronic meter that adopts TOF (Time of Speed) principle to measure flow velocity of gas medium, with class 1.5 accuracy and high stability, Gas Meter(USM-RA-G1.6/G2.5/G4, USM-RS-G1.6/G2.5/G4) is widely applied for residential natural gas metering application.

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Features

Stable flow field distribution;
High sensitivity and accuracy with intelligent software algorithm for Air,100% CH4 and different natural gases;
Low pressure loss due to absence of obstructing objects within flow path;
Low power consumption;
UART/TTL interface with direct output for connection;
Small footprint which permit compact designs;
Compliant to OIML R137 and EN14236 class 1.5.

Specifications

	CO2 Sensor CM1106-C
Measurement Range	USM-RA/RS-G1.6: 0.016~2.5 m?/h [0.57 ~ 88.29 ft?/h] USM-RA/RS-G2.5: 0.025~4 m?/h [0.88 ~ 141.26 ft?/h] USM-RA/RS-G4: 0.04~6 m?/h [1.41 ~ 211.88 ft?/h]; USM-RA/RS-L-G1.6: 0.016~2.5 m?/h [0.57 ~ 88.29 ft?/h] USM-RA/RS-L-G2.5: 0.025~4 m?/h [0.88 ~ 141.26 ft?/h] USM-RA/RS-L-G4: 0.04~6 m?/h [1.41 ~ 211.88 ft?/h]
Accuracy	Class 1.5
Error	Qmin≤Q<0.1Qmax: ±3%; 0.1Qmax≤Q≤Qmax:±1.5%
Additional permissible error outside the temperature range from -25 ?С to +55 ?С for every 10 ?С deviation from the range limit	USM-RA/RS-Series：-; USM-RA/RS-L-Series: ±0.4%
Gas Medium	Natural Gas, Natural Gas+23%H2, LPG
Case Housing	Aluminium Case/Steel Case
Battery	Aluminium Case: 1pc of 3.6V 19Ah Lithium battery; Steel Case: 2pcs of 3.6V 8.5Ah Lithium battery
Connector Type	Aluminium Case: Screw thread, G1-1/4; Steel Case: Screw thread, M30*2
Dimensions(mm)	Aluminium Case：230.5156.189.6; Steel Case：230.515689.6 ;
Weight(kg)	Aluminium Case: 1.8; Steel Case: 1.6
Center Distance of Connectors (mm)	Aluminium Case: 110; Steel Case: 130
Working Pressure	0~20kPa / 0~2.90psi
Pressure Loss	200pa / 0.029psi or less
Working Temperature	USM-RA/RS-Series：-25℃～55℃; -13℉ ~ 131℉; USM-RA/RS-L-Series：-40℃～60℃; -40℉ ~ 140℉
Storage Temperature	USM-RA/RS-Series：-25℃～70℃; -13℉ ~ 158℉; USM-RA/RS-L-Series：-40℃～70℃; -40℉ ~ 158℉;
Protection Class	Aluminium Case: IP65; Steel Case: IP54