Ultrasonic flow transducer BBFM-H1M

volumefor cooling systemsHVAC

Overview
The BBFM-H1M is a 1 MHz ultrasonic flow transducer designed for residential and industrial heat meters, cooling meters, district-heating metering and HVAC energy measurement. Recommended acoustic path: 0.05 to 3 m. Beamwidth: 6.2° ±10% half-power angle at -3 dB. Operating range: -40 to +80 °C; pressure rating up to 10 kgf (1 MPa). Protection: IP68.

Standard electrical and operating specifications

• Model: BBFM-H1M
• Center frequency: 1 MHz ±5%
• Recommended range: 0.05 to 3 m
• Minimum impedance: 120 Ω ±20%
• Capacitance: 1,200 pF ±20% at 1 kHz
• Operating voltage: peak voltage below 300 Vpp
• Operating temperature: -40 to +80 °C
• Pressure rating: up to 10 kgf (1 MPa)
• Beamwidth: 6.2° ±10% half-power angle at -3 dB
• Housing material: Composite
• Mounting: see dimensional drawing
• Protection rating: IP68
• Weight: 20 g ±5% with 1 m cable

Documented acoustic configurations

• Center frequency: 1 MHz ±5% — Recommended range: 0.05 to 3 m — Half-power angle at -3 dB: 6.2° ±10% — Housing material: Composite
• Center frequency: 1 MHz ±5% — Recommended range: 0.05 to 1 m — Half-power angle at -3 dB: 5° ±10% — Housing material: Brass

Information needed for meter integration

• Specify operating medium and temperature range
• Define required measuring distance / acoustic path
• Confirm target size and surface condition for acoustic coupling
• Verify mounting space and dimensional interface
• Match operating pressure and environmental protection (IP rating)
• Coordinate drive/receive electronics, cable length and connection method

Technical characteristics / specifications

• Model: BBFM-H1M
• Center frequency: 1 MHz ±5%
• Recommended range: 0.05 to 3 m
• Minimum impedance: 120 Ω ±20%
• Capacitance: 1,200 pF ±20% at 1 kHz
• Operating voltage: peak below 300 Vpp
• Operating temperature: -40 to +80 °C
• Pressure rating: up to 10 kgf (1 MPa)
• Beamwidth: 6.2° ±10% half-power angle at -3 dB
• Housing material: Composite (also documented in Brass for alternate configuration)
• Mounting: see dimensional drawing
• Protection rating: IP68
• Weight: 20 g ±5% with 1 m cable