Gemini Differential Pressure Flow Meter

Superior Performance. Rugged Design.

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• Precise accuracy and repeatability• Cost effective• Wide variety of fluids• Little or no straight run piping requirements• No additional flow conditioning devices needed• Low maintenance and long life• No moving parts• Wide flow range• Low head loss

The Preso Gemini Differential Pressure Flow Meter by Badger Meter has a cone-shaped element which shapes the flow profile ahead of the differential pressure (DP) measurement port without impacting the flow against a sharp surface, creating an extremely stable signal for measurement with minimal wear on the cone edge.

How the Gemini Measures Differential PressureThe Gemini differential pressure meter utilizes the center element to straighten the flow and create an ideal dynamic which allows differential pressure technology to be used in a unique way providing extensive flexibility in a wide variety of applications.

Preso® Gemini

SpecificationsApplications Liquids, steam, air and industrial gases

Pipe Sizes 1.0 inch (13 mm) and larger

Repeatability ± 0.1% or better

Flow Range 10:1 and greater

Accuracy ± 0.5% of actual flow

Standard Beta Ratio 0.40…0.80, special betas available

Permanent Pressure Loss Varies with beta ratio and DP

Installation Piping Requirements

Typically 0…3 diameters upstream and 0…1 diameters downstream of the cone are required, depending on fittings or valves in the adjacent pipeline

Construction Materials 316L stainless steel, carbon steel, other materials on request

End Fittings Threaded (NPT), flange, wafer, socket, and butt weld

Approvals CRN

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Preso Calculation Software.PresoCalc, a free engineering calculator available from Badger Meter, can help customers properly size the Gemini meter for their system or help with sizing for any DP meter project. Our technical service group is available to assist customers in using this software.

Differential AccessoriesBadger Meter offers a wide variety of technologies to best measure and track system parameters. Gemini can be partnered with an extensive range of DP transmitters including Foxboro, Azbil and Honeywell. Badger Meter also offers a complete flow metering solution by pairing the Gemini with our in-house flow computers and totalizers.

Gemini Software and Accessories

CB-30 Batch Controller

Foxboro Differential Pressure Transmitter

Three and Five Valve Manifolds

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Wafer Mount – Preso® Gemini

Part Number Construction

P G W Pipe SizeC) 1" Body-Element Instrument Beta Transmitter Material SurfaceD) 1-1/4" Material Connection Ratio Bracket Certificate FinishE) 1-1/2" 1) CS body-316/ H) 1/4" NPT 4) 0.4 1) SS bracket 1) Material 1) TungstenF) 2" 316L element (1"…3" NPS) 5) 0.5 2) With three certificates CarbideG) 2-1/2" 2) 316/316L I) 1/2" NPT 6) 0.6 valve 2) PMI 2) ChromiumH) 3" body-316/ (3" and up) 7) 0.7 3) With five 3) Combination CarbideI) 4" 316L element J) 1/2" socket 8) 0.8 valve of one and

X) Other X) Other weld X) Custom 4) None two above TransmitterX) Other 4) NACE Mounting

Pipe Schedule Calibration (MR0175) 2) 3 Valve manifoldA) Standard** Process Connection 1) Factory 5) NACE (WMP only)B) 10 A) RF flange 150# calibration (MR0103) 3) 5 Valve manifoldC) 20 B) RF flange 300# Instrument Valve 2) Special X) Other (WMP only)D) 30 C) RF flange 600# A) 1/4" Needle valve CS calibration* 0) None 4) MountingE) 40 D) RF flange 900# B) 1/2" Needle valve CS Z) Not required bracket onlyJ) 120 X) Other C) 1/4" Needle valve SS Welding X) OtherL) 160 D) 1/2" Needle valve SS Standard 0) None

M) XH E) 1/2" Gate w/cross CS (steam) A) StandardN) XXH F) 1/2" Gate w/cross SS (steam) B) ASME B31.1O) 5S X) Other Hydrostatic C) ASME B31.3P) 40S Z) Not required Testing X) Other NDE TestingQ) 80S 1) Hydro with A) X-ray/Dye Pen 5%X) Other certificate X) Other

0) None 0) None

* Standard calibration is performed at Badger Meter with five data points (0.5 percent accuracy)** Pipe schedule "Standard" is schedule 40 up to 10" and 3.75" wall at 12" and larger.

A B

B

C

A

C

A

C

A

B

A

C

B

B

Flanged

Butt Weld

Wafer

Socket Weld

Threaded

Wafer

5

Threaded and Socket Weld Mount – Preso® Gemini

Part Number Construction

PG SeriesT) Threaded(NPT) Body-Element Instrument Beta Transmitter Material SurfaceS) Socket weld Material Connection Ratio Bracket Certificate Finish

1) CS body-316/ H) 1/4" NPT 4) 0.4 1) SS bracket 1) Material 1) TungstenPipe Size 316L element (1"…3" NPS) 5) 0.5 2) With three certificates CarbideC) 1" 2) 316/316L I) 1/2" NPT 6) 0.6 valve 2) PMI 2) ChromiumD) 1-1/4" body-316/ (3" and up) 7) 0.7 3) With five 3) Combination CarbideE) 1-1/2" 316L element J) 1/2" socket 8) 0.8 valve of one andF) 2" X) Other weld X) Custom 4) None two aboveX) Other X) Other 4) NACE Transmitter

Calibration (MR0175) MountingPipe Schedule Instrument Valve 1) Factory 5) NACE 2) 3 Valve manifoldA) Standard** Process Connection A) 1/4" Needle valve CS calibration (MR0103) (WMP only)B) 10 F) NPT C) 1/4" Needle valve SS 2) Special X) Other 3) 5 Valve manifoldD) 30 G) Socket weld X) Other calibration* 0) None (WMP only)E) 40 X) Other Z) Not required Z) Not required 4) MountingG) 80 Welding bracket onlyL) 160 Standard X) Other

M) XH Hydrostatic Testing A) Standard 0) NoneN) XXH 1) Hydro with certificate B) ASME B31.1O) 5S 0) None C) ASME B31.3P) 40S X) Other NDE TestingQ) 80S A) X-ray/Dye Pen 5%X) Other X) Other

0) None

* Standard calibration is performed at Badger Meter with five data points (0.5 percent accuracy)** Pipe schedule "Standard" is schedule 40 up to 10" and 3.75" wall for 12" and larger.

A B

B

C

A

C

A

C

A

B

A

C

B

B

Flanged

Butt Weld

Wafer

Socket Weld

Threaded

Socket Weld

Threaded

6

Flanged Mount – Preso® Gemini

Part Number Construction

P G F Pipe SizeC) 1" Body-Element Beta Transmitter Material SurfaceD) 1-1/4" Material Ratio Bracket Certificate FinishE) 1-1/2" 1) CS body-316/ 4) 0.4 1) SS bracket 1) Material 1) TungstenF) 2" 316L element 5) 0.5 2) With three certificates CarbideG) 2-1/2" 2) 316/316L 6) 0.6 valve 2) PMI 2) ChromiumH) 3" body-316/ 7) 0.7 3) With five 3) Combination CarbideI) 4" 316L element 8) 0.8 valve of one andJ) 5" X) Other X) Other 4) None two aboveK) 6" 4) NACEL) 8" Calibration (MR0175) Transmitter

M) 10" Process Connection 1) Factory 5) NACE MountingN) 12" A) RF flange 150# calibration (MR0103) 2) 3 Valve manifoldO) 14" B) RF flange 300# Instrument Valve 2) Special X) Other (WMP only)P) 16" C) RF flange 600# A) 1/4" Needle valve CS calibration* 0) None 3) 5 Valve manifoldX) Other D) RF flange 900# B) 1/2" Needle valve CS Z) Not required (WMP only)

X) Other C) 1/4" Needle valve SS Welding 4) MountingPipe Schedule D) 1/2" Needle valve SS Standard bracket onlyA) Standard** Instrument E) 1/2" Gate w/cross CS (steam) A) Standard X) OtherB) 10 Connection F) 1/2" Gate w/cross SS (steam) B) ASME B31.1 0) NoneC) 20 A) 2" RF flange 150# X) Other C) ASME B31.3D) 30 (2" and up) Z) Not required X) OtherE) 40 B) 2" RF flange 300#F) 60 (2" and up) NDE TestingG) 80 C) 2" RF flange 600# Hydrostatic Testing A) X-ray/Dye Pen 5%H) 100 (2" and up) 1) Hydro with certificate X) Other J) 120 D) 3" RF flange 150# 0) None 0) NoneK) 140 (3" and up)L) 160 E) 3" RF flange 300#

M) XH (3" and up)N) XXH F) 3" RF flange 600#O) 5S (3" and up)P) 40S G) 3” RF flange 900#Q) 80S (3" and up)X) Other H) 1/4" NPT (1"…3" NPS)

I) 1/2" NPT (>3" NPS)J) 1/2" socket weldX) Other

* Standard calibration is performed at Badger Meter with five data points (0.5 percent accuracy)** Pipe schedule "Standard" is schedule 40 up to 10" and 3.75" wall at 12" and larger.

A B

B

C

A

C

A

C

A

B

A

C

B

B

Flanged

Butt Weld

Wafer

Socket Weld

Threaded

Flanged

7

Butt Weld Mount – Preso® Gemini

Part Number Construction

P G B Pipe SizeC) 1" Body-Element Beta Transmitter Material SurfaceD) 1-1/4" Material Ratio Bracket Certificate FinishE) 1-1/2" 1) CS body-316/ 4) 0.4 1) SS bracket 1) Material 1) TungstenF) 2" 316L element 5) 0.5 2) With three certificates CarbideG) 2-1/2" 2) 316/316L 6) 0.6 valve 2) PMI 2) ChromiumH) 3" body-316/ 7) 0.7 3) With five 3) Combination CarbideI) 4" 316L element 8) 0.8 valve of one andJ) 5" X) Other X) Custom 4) None two above TransmitterK) 6" 4) NACE MountingL) 8" Calibration (MR0175) 2) 3 Valve manifold

M) 10" Process Connection 1) Factory 5) NACE (WMP only)N) 12" E) Butt weld calibration (MR0103) 3) 5 Valve manifoldO) 14" X) Other Instrument Valve 2) Special X) Other (WMP only)P) 16" A) 1/4" Needle valve CS calibration* 0) None 4) MountingX) Other B) 1/2" Needle valve CS Z) Not required bracket only

C) 1/4" Needle valve SS Welding X) OtherPipe Schedule D) 1/2" Needle valve SS Standard 0) NoneA) Standard** Instrument E) 1/2" Gate w/cross CS (steam) A) StandardB) 10 Connection F) 1/2" Gate w/cross SS (steam) B) ASME B31.1C) 20 A) 2" RF flange 150# X) Other C) ASME B31.3D) 30 (2" and up) Z) Not required X) OtherE) 40 B) 2" RF flange 300# NDE TestingF) 60 (2" and up) A) X-ray/Dye Pent 5%G) 80 C) 2" RF flange 600# Hydrostatic Testing X) OtherH) 100 (2" and up) 1) Hydro with certificate 0) None J) 120 D) 3" RF flange 150# 0) NoneK) 140 (3" and up)L) 160 E) 3" RF flange 300#

M) XH (3" and up)N) XXH F) 3" RF flange 600#O) 5S (3" and up)P) 40S G) 3" RF flange 900#Q) 80S (3" and up)X) Other H) 1/4” NPT (1"…3" NPS)

I) 1/2" NPT (>3" NPS)J) 1/2" socket weldX) Other

* Standard calibration is performed at Badger Meter with five data points (0.5 percent accuracy)** Pipe schedule "Standard" is schedule 40 up to 10" and 3.75" wall at 12" and larger.

A B

B

C

A

C

A

C

A

B

A

C

B

B

Flanged

Butt Weld

Wafer

Socket Weld

Threaded

Butt Weld

DPM-BR-01006-EN-01 (November, 2014)

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