Flow Control

2540A5A52PS

Brooks Instrument / Key Instruments 2540 Series Variable Area Flowmeter

About this part

2540A5A52PS is a 2540 Series precision-machined acrylic variable-area flowmeter configured for a 10–100 scfm air range, 1-inch FNPT PVC fittings, Buna-N seals, standard back connections, and no integral valve. The official Key Instruments exact-part page and 2500 Series model-code datasheet support this configuration; the datasheet specifies ±2% full-scale accuracy, a clear acrylic body, stainless-steel float, 100 psig maximum pressure, and 150°F (65°C) maximum temperature. Confirm the physical scale, calibration basis, condition, and process compatibility before installation

Configurations vary. Verify the exact unit before choosing a replacement.

Specifications Photos (4)Listing history

Brooks Instrument 2540A5A52PS 2540 Series acrylic variable-area flowmeter auction image

Archived part photo · View gallery

Key Facts

ManufacturerBrooks Instrument / Key Instruments

Part number2540A5A52PS

Product familyConfiguration-specific

Device typeFlowmeter

Configuration statusConfiguration varies

Application classIndustrial automation and process equipment

CategoryFlow Control

Specifications

Identification

Series and device type

2540 Series precision-machined acrylic variable-area flowmeter

Flow

Calibrated air range

10–100 scfm air (tube code 5A52)

Performance

Accuracy

±2% of full scale at reference conditions of 70°F (21.1°C) and 14.7 psia (1 bar absolute)

Connections

Fittings

1-inch female NPT, PVC

Configuration

Connection and valve arrangement

Standard back connections; no integral valve

Materials

Body	Clear acrylic
Float	Stainless steel
Seals	Buna-N

Operating limits

Maximum pressure	100 psig
Maximum temperature	150°F (65°C)

Part Photos

4 images

Historical archive images for identification, labels, connectors, and condition reference, not current inventory.

Historical Listings & Prices

Historical listing data, not a current offer

Archive records9Tracked historical listing records

Historical median price$110.00Based on archived listing records

Recorded price range$93.50 - $110.00Low to high recorded listing price

Local documents0PDF copies available from Sonisys

Recorded price context

The typical recorded price range is $93.50 to $110.00. Based on 9 archived listing records; not a current offer, appraisal, or confirmed sale price.

View archived listing titles

(1) Brooks Instruments 2540A5A52PS

Archived listings

Other Part Numbers & Aliases

2540A5A52PSBrooks 2540A5A52PSBrooks Instrument 2540A5A52PSKey Instruments 2540A5A52PS