flow meters

Reliable HVAC performance starts with proper flow balance. Whether you're commissioning a new hydronic installation or troubleshooting an existing system, the right flow control tools help verify flow rates, support efficient operation and keep systems running as designed. Blackhawk Supply has a wide selection of HVAC flow control valves for sale to help contractors optimize system performance. From verifying flow rates to advanced diagnostic testing, our collection includes the specialized tools professionals rely on to complete critical tasks.

Sort by

Dwyer OP-F-1 Orifice plate flowmeter | 2" line size | 0.600" bore | 0.29 Beta | water capacity: 20" d.p. W/C | 5.52 GPM flow; air capacity: 20" d.p. W/C | 20.92 SCFM @ 14.7 psia | 32.38 SCFM @ 20 psig | 59.13 SCFM @ 100 psig; 3 lb. | Blackhawk Supply

OP-F-1 | Orifice plate flowmeter | 2" line size | 0.600" bore | 0.29 Beta | water capacity: 20" d.p. W / C | 5.52 GPM flow; air capacity: 20" d.p. W / C | 20.92 SCFM @ 14.7 psia | 32.38 SCFM @ 20 psig | 59.13 SCFM @ 100 psig; 3 lb. | Dwyer

Brand: Dwyer

SKU: OP-F-1

Dwyer OP-E-2 Orifice plate flowmeter | 1.5" line size | 0.800" bore | 0.50 Beta | water capacity: 100" d.p. W/C | 22.73 GPM flow; air capacity: 100" d.p. W/C | 80.82 SCFM @ 14.7 psia | 129.68 SCFM @ 20 psig | 251.5 SCFM @ 100 psig; 2 lb. | Blackhawk Supply

OP-E-2 | Orifice plate flowmeter | 1.5" line size | 0.800" bore | 0.50 Beta | water capacity: 100" d.p. W / C | 22.73 GPM flow; air capacity: 100" d.p. W / C | 80.82 SCFM @ 14.7 psia | 129.68 SCFM @ 20 psig | 251.5 SCFM @ 100 psig; 2 lb. | Dwyer

Brand: Dwyer

SKU: OP-E-2

Dwyer OP-D-1 Orifice plate flowmeter | 1.25" line size | 0.400" bore | 0.29 Beta | water capacity: 20" d.p. W/C | 2.46 GPM flow; air capacity: 20" d.p. W/C | 9.31 SCFM @ 14.7 psia | 14.41 SCFM @ 20 psig | 26.3 SCFM @ 100 psig; 2 lb. | Blackhawk Supply

OP-D-1 | Orifice plate flowmeter | 1.25" line size | 0.400" bore | 0.29 Beta | water capacity: 20" d.p. W / C | 2.46 GPM flow; air capacity: 20" d.p. W / C | 9.31 SCFM @ 14.7 psia | 14.41 SCFM @ 20 psig | 26.3 SCFM @ 100 psig; 2 lb. | Dwyer

Brand: Dwyer

SKU: OP-D-1

Dwyer PE-G-1 PVC orifice plate flowmeter | 2-1/2" line size | 0.750" bore | 0.3 Beta | water capacity: 20" d.p. W/C | 8.63 GPM flow; air capacity: 32.71 SCFM @ 14.7 psia | 50.64 SCFM @ 20 psig | 92.48 SCFM @ 100 psig; 2 lb. | Blackhawk Supply

PE-G-1 | PVC orifice plate flowmeter | 2-1 / 2" line size | 0.750" bore | 0.3 Beta | water capacity: 20" d.p. W / C | 8.63 GPM flow; air capacity: 32.71 SCFM @ 14.7 psia | 50.64 SCFM @ 20 psig | 92.48 SCFM @ 100 psig; 2 lb. | Dwyer

Brand: Dwyer

SKU: PE-G-1

Dwyer TE-O-2 PTFE orifice plate flowmeter | 12" line size | 6.000" bore | 0.5 Beta | water capacity: 100" d.p. W/C | 1271.62 GPM flow; air capacity: 4530 SCFM @ 14.7 psia | 7288.16 SCFM @ 20 psig | 13570.33 SCFM @ 100 psig; 10 lb. | Blackhawk Supply

TE-O-2 | PTFE orifice plate flowmeter | 12" line size | 6.000" bore | 0.5 Beta | water capacity: 100" d.p. W / C | 1271.62 GPM flow; air capacity: 4530 SCFM @ 14.7 psia | 7288.16 SCFM @ 20 psig | 13570.33 SCFM @ 100 psig; 10 lb. | Dwyer

Brand: Dwyer

SKU: TE-O-2

Dwyer PE-E-1 PVC orifice plate flowmeter | 1-1/2" line size | 0.500" bore | 0.31 Beta | water capacity: 20" d.p. W/C | 3.85 GPM flow; air capacity: 14.57 SCFM @ 14.7 psia | 22.55 SCFM @ 20 psig | 41.16 SCFM @ 100 psig; 2 lb. | Blackhawk Supply

PE-E-1 | PVC orifice plate flowmeter | 1-1 / 2" line size | 0.500" bore | 0.31 Beta | water capacity: 20" d.p. W / C | 3.85 GPM flow; air capacity: 14.57 SCFM @ 14.7 psia | 22.55 SCFM @ 20 psig | 41.16 SCFM @ 100 psig; 2 lb. | Dwyer

Brand: Dwyer

SKU: PE-E-1

Dwyer TE-L-3 PTFE orifice plate flowmeter | 6" line size | 4.200" bore | 0.69 Beta | water capacity: 320" d.p. W/C | 1226.98 GPM flow; air capacity: 3097.20 SCFM @ 14.7 psia | 5325.20 SCFM @ 20 psig | 10219.28 SCFM @ 100 psig; 4 lb. | Blackhawk Supply

TE-L-3 | PTFE orifice plate flowmeter | 6" line size | 4.200" bore | 0.69 Beta | water capacity: 320" d.p. W / C | 1226.98 GPM flow; air capacity: 3097.20 SCFM @ 14.7 psia | 5325.20 SCFM @ 20 psig | 10219.28 SCFM @ 100 psig; 4 lb. | Dwyer

Brand: Dwyer

SKU: TE-L-3

Dwyer TE-L-1 PTFE orifice plate flowmeter | 6" line size | 1.800" bore | 0.3 Beta | water capacity: 20" d.p. W/C | 49.46 GPM flow; air capacity: 187.86 SCFM @ 14.7 psia | 291 SCFM @ 20 psig | 531.75 SCFM @ 100 psig; 4 lb. | Blackhawk Supply

TE-L-1 | PTFE orifice plate flowmeter | 6" line size | 1.800" bore | 0.3 Beta | water capacity: 20" d.p. W / C | 49.46 GPM flow; air capacity: 187.86 SCFM @ 14.7 psia | 291 SCFM @ 20 psig | 531.75 SCFM @ 100 psig; 4 lb. | Dwyer

Brand: Dwyer

SKU: TE-L-1

Dwyer TE-A-2 PTFE orifice plate flowmeter | 1/2" line size | 0.310" bore | 0.5 Beta | water capacity: 100" d.p. W/C | 3.44 GPM flow; air capacity: 12.21 SCFM @ 14.7 psia | 19.58 SCFM @ 20 psig | 36.37 SCFM @ 100 psig; 1 lb. | Blackhawk Supply

TE-A-2 | PTFE orifice plate flowmeter | 1 / 2" line size | 0.310" bore | 0.5 Beta | water capacity: 100" d.p. W / C | 3.44 GPM flow; air capacity: 12.21 SCFM @ 14.7 psia | 19.58 SCFM @ 20 psig | 36.37 SCFM @ 100 psig; 1 lb. | Dwyer

Brand: Dwyer

SKU: TE-A-2

Dwyer TE-G-2 PTFE orifice plate flowmeter | 2-1/2" line size | 1.250" bore | 0.5 Beta | water capacity: 100" d.p. W/C | 55.54 GPM flow; air capacity: 197.54 SCFM @ 14.7 psia | 317.58 SCFM @ 20 psig | 590.91 SCFM @ 100 psig; 2 lb. | Blackhawk Supply

TE-G-2 | PTFE orifice plate flowmeter | 2-1 / 2" line size | 1.250" bore | 0.5 Beta | water capacity: 100" d.p. W / C | 55.54 GPM flow; air capacity: 197.54 SCFM @ 14.7 psia | 317.58 SCFM @ 20 psig | 590.91 SCFM @ 100 psig; 2 lb. | Dwyer

Brand: Dwyer

SKU: TE-G-2

Dwyer TE-E-2 PTFE orifice plate flowmeter | 1-1/2" line size | 0.800" bore | 0.5 Beta | water capacity: 100" d.p. W/C | 22.73 GPM flow; air capacity: 80.82 SCFM @ 14.7 psia | 129.68 SCFM @ 20 psig | 241.5 SCFM @ 100 psig; 2 lb. | Blackhawk Supply

TE-E-2 | PTFE orifice plate flowmeter | 1-1 / 2" line size | 0.800" bore | 0.5 Beta | water capacity: 100" d.p. W / C | 22.73 GPM flow; air capacity: 80.82 SCFM @ 14.7 psia | 129.68 SCFM @ 20 psig | 241.5 SCFM @ 100 psig; 2 lb. | Dwyer

Brand: Dwyer

SKU: TE-E-2

Dwyer HFL-4-25 In-line flow monitor | 1" female NPT | 2-25 GPM (7.5-95 LPM) oil. | Blackhawk Supply

HFL-4-25 | In-line flow monitor | 1" female NPT | 2-25 GPM (7.5-95 LPM) oil. | Dwyer

Brand: Dwyer

SKU: HFL-4-25

Dwyer HFL-2-05 In-line flow monitor | 1/2" female NPT | 0.5-5 GPM (1-19 LPM) oil. | Blackhawk Supply

HFL-2-05 | In-line flow monitor | 1 / 2" female NPT | 0.5-5 GPM (1-19 LPM) oil. | Dwyer

Brand: Dwyer

SKU: HFL-2-05

Dwyer HFH-4-35 In-line flow monitor | 1" female NPT | 5-35 GPM (19-130 LPM) water. | Blackhawk Supply

HFH-4-35 | In-line flow monitor | 1" female NPT | 5-35 GPM (19-130 LPM) water. | Dwyer

Brand: Dwyer

SKU: HFH-4-35

Dwyer HFH-2-10 In-line flow monitor | 1/2" female NPT | 1-10 GPM (3.8-38 LPM) water. | Blackhawk Supply

HFH-2-10 | In-line flow monitor | 1 / 2" female NPT | 1-10 GPM (3.8-38 LPM) water. | Dwyer

Brand: Dwyer

SKU: HFH-2-10

Dwyer HFB-5-50 In-line flow monitor | 1-1/2" female NPT | 5-50 GPM (19-189 LPM) water. | Blackhawk Supply

HFB-5-50 | In-line flow monitor | 1-1 / 2" female NPT | 5-50 GPM (19-189 LPM) water. | Dwyer

Brand: Dwyer

SKU: HFB-5-50

Dwyer HFB-4-35 In-line flow monitor | 1" female NPT | 5-35 GPM (19-130 LPM) water. | Blackhawk Supply

HFB-4-35 | In-line flow monitor | 1" female NPT | 5-35 GPM (19-130 LPM) water. | Dwyer

Brand: Dwyer

SKU: HFB-4-35

Dwyer HFB-3-15 In-line flow monitor | 3/4" female NPT | 2-15 GPM (7.5-55 LPM) water. | Blackhawk Supply

HFB-3-15 | In-line flow monitor | 3 / 4" female NPT | 2-15 GPM (7.5-55 LPM) water. | Dwyer

Brand: Dwyer

SKU: HFB-3-15

Dwyer HFB-2-05 In-line flow monitor | 1/2" female NPT | 0.5-5 GPM (1-19 LPM) water. | Blackhawk Supply

HFB-2-05 | In-line flow monitor | 1 / 2" female NPT | 0.5-5 GPM (1-19 LPM) water. | Dwyer

Brand: Dwyer

SKU: HFB-2-05

Dwyer DTFW-3S-20W Range 0-20 GPM water | 1" npt | ss body | Blackhawk Supply

DTFW-3S-20W | Range 0-20 GPM water | 1" npt | ss body | Dwyer

Brand: Dwyer

SKU: DTFW-3S-20W

Dwyer DTFW-3S-10W Range 0-10 GPM water | 1" npt | ss body | Blackhawk Supply

DTFW-3S-10W | Range 0-10 GPM water | 1" npt | ss body | Dwyer

Brand: Dwyer

SKU: DTFW-3S-10W

Dwyer DTFW-2S-5W Range 0-5 GPM water | 1/2" npt | ss body | Blackhawk Supply

DTFW-2S-5W | Range 0-5 GPM water | 1 / 2" npt | ss body | Dwyer

Brand: Dwyer

SKU: DTFW-2S-5W

Dwyer DTFW-2S-3W Range 0-3 GPM water | 1/2" npt | ss body | Blackhawk Supply

DTFW-2S-3W | Range 0-3 GPM water | 1 / 2" npt | ss body | Dwyer

Brand: Dwyer

SKU: DTFW-2S-3W

Dwyer DTFW-2S-10W Range 0-10 GPM water | 1/2" npt | ss body | Blackhawk Supply

DTFW-2S-10W | Range 0-10 GPM water | 1 / 2" npt | ss body | Dwyer

Brand: Dwyer

SKU: DTFW-2S-10W

← 123 … 6768697071 727374→

Committed to customer satisfaction

as experts in Flow Meters

Recently Viewed

Popular Products

View all →

Contemporary Controls BAST-221C-B2 BACnet MS/TP Thermostat 2-Heat, 2-Cool, 1-Fan, Wired | Blackhawk Supply

BAST-221C-B2 | BACnet MS/TP Thermostat 2-Heat, 2-Cool, 1-Fan, Wired | Contemporary Controls

Brand: Contemporary Controls

SKU: BAST-221C-B2

Belimo B225+LF24 US CCV | 1" | 2 Way | 30 Cv | w/ Spg Rtn | 24V | On/Off | Blackhawk Supply

B225+LF24 US | CCV | 1" | 2 Way | 30 Cv | w/ Spg Rtn | 24V | On/Off | Belimo

Brand: Belimo

SKU: B225+LF24 US

Belimo LMB24-SR Damper Actuator | 45 in-lb | Non-Spg Rtn | 24V | Modulating | Blackhawk Supply

LMB24-SR | Damper Actuator | 45 in-lb | Non-Spg Rtn | 24V | Modulating | Belimo

Brand: Belimo

SKU: LMB24-SR

Belimo P2800A GR Feedback potentiometer 2800 ohms. | Blackhawk Supply

P2800A GR | Feedback potentiometer 2800 ohms. | Belimo

Brand: Belimo

SKU: P2800A GR

Veris PX3ULX05 Bluetooth Universal Enclosure Dry Media Differential Pressure/Air Velocity Transducer with LCD Display, 0 to 10 in-WG | Blackhawk Supply

PX3ULX05 | Bluetooth Universal Enclosure Dry Media Differential Pressure/Air Velocity Transducer with LCD Display, 0 to 10 in-WG | Veris

Brand: Veris

SKU: PX3ULX05

Belimo FSNF120 US Fire & Smoke Actuator | 70 in-lb | Spg Rtn | 120V | On/Off | 1m Cable | Blackhawk Supply

FSNF120 US | Fire & Smoke Actuator | 70 in-lb | Spg Rtn | 120V | On/Off | 1m Cable | Belimo

Brand: Belimo

SKU: FSNF120 US

Veris PWLX04S 12 to 30 VDC/24 VAC Input 4 to 20 mA/0 to 5 V/0 to 10 V Output Wet Media Differential Pressure Transducer with LCD Display, 0 to 100 psig | Blackhawk Supply

PWLX04S | 12 to 30 VDC/24 VAC Input 4 to 20 mA/0 to 5 V/0 to 10 V Output Wet Media Differential Pressure Transducer with LCD Display, 0 to 100 psig | Veris

Brand: Veris

SKU: PWLX04S

Schneider Electric MG350V-24F SmartX, Globe Valve Actuator, floating, non-spring return, 24 Vac/Vdc, 78 lbf, LED status indicator, NEMA 2 | Blackhawk Supply

MG350V-24F | SmartX, Globe Valve Actuator, floating, non-spring return, 24 Vac/Vdc, 78 lbf, LED status indicator, NEMA 2 | Schneider Electric

Brand: Schneider Electric

SKU: MG350V-24F

The product has been added to cart.