Seraphin

What Seraphin does

Seraphin is a U.S. manufacturer of volumetric calibration equipment founded in 1915 and currently operating as a division of Pemberton Fabricators, Inc., a privately held diversified industrial group headquartered in Rancocas, New Jersey. The company designs and builds calibrated measures and volumetric provers used to verify the accuracy of liquid measurement devices, ranging from 5-gallon handheld test measures for retail fueling stations to 50-, 60-, and 100-gallon heavy-duty Series J provers and trailer-mounted bulk terminal calibration units. Core product families also include Special J vapor-retention provers, mobile and slip-on calibration units, DOT-compliant LPG mobile calibration trailers, and laboratory-grade equipment (Series M high-sensitivity neck provers, Series C slicker plate provers, and Series F/G liquid graduate cylinders). All equipment is constructed from Series 300 stainless steel and calibrated by NVLAP-accredited laboratories with traceability to NIST, complying with NIST Handbook 105-3 and 105-4, OIML R-120, and ASME Section VIII Division 1.

The company's technology is precision mechanical rather than digital: products rely on tight machining tolerances, calibrated internal volumes, and standardized draining/leveling mechanisms rather than software, sensors, or networked instrumentation. Product differentiators center on NIST-traceable accuracy, regulatory compliance for weights-and-measures enforcement and custody transfer, and durable stainless-steel construction the company describes as having virtually unlimited life expectancy.

Seraphin sells primarily direct-to-consumer through its e-commerce storefront, seraphinusa.com, with a Request-a-Quote workflow for larger provers and bulk terminal systems and standard cart checkout for spare parts (priced from $0.25 to $262, with a $125 minimum spare-parts order). Payment terms are Net 30, with standard U.S. shipping and sales tax collected in CA, GA, KY, and NJ. Revenue is generated through three streams: hardware sales of calibrated measures and provers, recurring spare-parts and accessory sales supporting the installed base, and professional calibration services through NVLAP-traceable laboratory facilities. The customer base spans state and local government weights-and-measures departments and metrology laboratories, petroleum terminals and fuel distributors, LPG distributors and retailers, and chemical, drug, and food manufacturing facilities requiring precision liquid measurement. The company serves only the U.S. market from a single New Jersey site, with no international distribution and no public revenue, funding, or headcount disclosure.

Name

Seraphin

Legal name

Pemberton Fabricators, Inc.

Website

https://seraphinusa.com

Company type

Private

Founded year

1915

Operating status

Operating

Headcount range

11–50 employees

Short description

Seraphin is a U.S. manufacturer of NIST-traceable volumetric calibration equipment, founded in 1915 as a division of Pemberton Fabricators, serving government weights-and-measures agencies, petroleum terminals, LPG distributors, and chemical, drug, and food manufacturers with provers, test measures, and trailer-mounted calibration systems.

Ownership category

akta.pro rank

Product category

Volumetric Calibration Equipment

NAICS

Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (3345)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Totalizing Fluid Meters & Counting Devices (3824)

akta.pro primary industry

Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH)

akta.pro secondary industries

Metrology, Calibration & Testing Equipment (Balances, pH/DO, Standards) (HLAGAIAL), Metering Equipment Testing, Calibration & Certification (EUAJAKAA), Weighing Systems / Onboard Scales Calibration & Certification (TLAKANAN)

Keywords

• Volumetric calibration equipment
• Calibrated test measures
• Volumetric provers
• Custody transfer measurement
• LPG calibration systems

Headquarters

HQ city

Rancocas

HQ country

United States

HQ region

North America

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Supply Chain, Personnel, Operations, Technology or R&D, Marketing or Sales, Infrastructure

Revenue model

1. Hardware Sales - Calibration Equipment: Seraphin generates revenue primarily through the sale of calibrated measures, volumetric provers, and calibration equipment. Products range from handheld test measures to large-scale bulk terminal provers and mobile calibration units. Sales occur through direct e-commerce and quote-based procurement for larger equipment.
2. Spare Parts and Accessories: Sale of replacement parts, repair kits, and accessories for all Seraphin product lines. Products include gauge glasses, valves, scale components, and specialized hardware with prices ranging from $0.25 to $262.
3. Professional Services - Calibration: Calibration services provided through certified NVLAP laboratory facilities, traceable to National Institute of Standards and Technology. Includes complete pressure and temperature correction tables.

Pricing tiers

Go-to-market motion1 record

Distribution channels2 records

Marketing channels3 records

Core offering

Seraphin manufactures and sells NIST-traceable volumetric calibration equipment made from Series 300 Stainless Steel, including handheld test measures, mobile calibration units, heavy-duty bulk terminal provers (Series J), LPG calibration trailers, and laboratory waterdraw/slicker plate provers (Series C, F, G, M). Products are calibrated by NVLAP-accredited laboratories and built to NIST, OIML, and ASME standards for use by government weights and measures inspectors, petroleum terminals, and LPG distributors.

Product overview

Seraphin is a manufacturer of calibrated measures and volumetric calibration equipment founded in 1915, offering a comprehensive portfolio of precision measurement products. The core product lines include Handheld Test Measures for retail fueling station verification, Mobile Calibration Units for on-site motor fuel prover calibration, and Heavy Duty Series J Provers for bulk terminal custody transfer. The company also produces Special J Provers for LPG vapor retention applications, LPG Provers and Mobile Systems including specialized trailers with dual prover configurations, Bulk Terminal Provers for industrial calibration, and Laboratory Calibration Equipment encompassing Series M High Sensitivity Neck Provers (waterdraw calibration standards), Series C Slicker Plate Provers (laboratory reference standards), and Series F/G Liquid Graduate Cylinders for precision liquid measurement. Supporting these product lines are Fuel Tanks for Weight Carts and comprehensive spare parts programs. All products are manufactured with stainless steel construction for extended durability and calibration traceable to NIST standards. The company operates from Rancocas, New Jersey.

Differentiator

Problem solved

Functional benefit

Products and services

• Handheld Test Measures Handheld calibrated test measures for verifying the accuracy of liquid meters at retail fueling stations, available in stainless steel construction with various gallon capacities.
• Mobile Calibration Units Portable calibration systems for retail and mobile motor fuel prover calibration, including slip-on units and low-profile side access calibration trailers.
• Special J Provers 5 gallon or 20 liter vapor retention provers designed for precise measurement in LPG and fuel applications with vapor control features.
• Heavy Duty Series J Provers Industrial-grade volumetric calibration provers for bulk terminal custody transfer applications, available in 50, 60, and 100 gallon capacities.
• Bulk Terminal Provers and Mobile Units Large-scale trailer-mounted volumetric calibration units for bulk terminal operations and mobile calibration services.
• LPG Provers and Mobile Systems Liquefied petroleum gas calibration provers and mobile calibration trailers, including models with 100 gallon and 25 gallon prover capacities for LPG meter verification.
• Fuel Tanks for Weight Carts Specialized fuel tanks designed for use with weight carts in calibration applications, with accompanying spare parts.
• Laboratory Calibration Equipment High-precision laboratory calibration equipment including high resolution/waterdraw provers, slicker plate provers, and liquid graduate cylinders for metrology laboratory environments.
• Series M High Sensitivity Neck Provers High-resolution test measures with small diameter necks designed for waterdraw calibration of displacement type provers, built to NIST Handbook 105-3, OIML R-120, and MPMC Chapter 4 specifications.
• Series C Slicker Plate Provers Type 300 stainless steel prover standards for metrology laboratory environments, available in capacities from 5 liters to 379 liters, used to measure accuracy and set zero marks on test measures and provers.
• Series F Liquid Graduate Cylinders Extremely accurate graduated cylinders for inspectors in plant, field, and precision liquid measurement applications, used in chemical, drug, food, and petroleum industries.
• Series G Liquid Graduate Cylinders Continuous scale reading liquid graduate cylinders with Series 300 stainless steel construction, calibration traceable to NIST, center bottom drain with ball valve, and three adjustable feet for leveling.
• Handheld Test Measure Accessories and Spare Parts

Quantifiable outcome

• Stainless steel construction provides virtually unlimited life expectancy for calibration equipment
• +1 more outcomes

Segments4 records

Ideal customer profiles3 records

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature4 records

Scale indicators1 record

Recent moves4 records

Broad incumbents

• Endress+Hauser: Global industrial measurement instrumentation supplier covering flow, level, pressure, temperature, and analytical measurement, including calibration services. Comparable because it sells competing calibration standards for tank gauging, custody transfer, and process measurement that overlap directly with Seraphin's petroleum and laboratory prover lines.
• Mesa Laboratories: Acquired-focused measurement and calibration specialist operating across liquid flow, gas flow, and laboratory calibration. Comparable because it sells volumetric calibration hardware and calibration services that compete with Seraphin's prover and graduated-cylinder product lines for metrology labs and industrial users.
• Emerson Rosemount: Major manufacturer of process measurement (pressure, temperature, flow, level) including Coriolis and magnetic flow meters displacing volumetric proving in custody transfer. Comparable as a broad incumbent offering alternative measurement architectures that compete with Seraphin's mechanical prover portfolio.
• Transcat: Provider of accredited calibration services and distributor of calibration instruments across life sciences, industrial, and aerospace. Comparable because it competes as a calibration services/procurement channel for the same institutional buyers Seraphin serves, though via service contracts rather than hardware sales.
• Trescal: Global accredited calibration services provider across dimensional, electrical, physical, and process calibration. Comparable because it services the same regulated industrial customer base as Seraphin, providing an alternative path to compliant measurement verification without capital equipment purchase.

Direct peers

• Brooks Instrument: Manufacturer of precision flow measurement and control instrumentation, including calibration equipment for liquid and gas flow. Comparable because it competes directly with Seraphin in liquid-volume calibration hardware for custody-transfer and laboratory applications.
• Liquid Controls: Specialist in custody-transfer flow meters, registers, and accessories for petroleum, LPG, and chemical measurement. Comparable because it sells companion measurement hardware that addresses the same fuel-dispenser and bulk-terminal prover use cases as Seraphin's Series J and mobile prover units.
• Smith Meter (part of IDEX / FMC Technologies legacy): Manufacturer of liquid flow meters and provers for the petroleum industry, including bulk-terminal and custody-transfer measurement. Comparable because it competes head-to-head with Seraphin in volumetric proving for fuel terminals and pipeline metering stations.
• Beamex: Specialist in industrial calibration equipment, calibration software, and accredited calibration services for process instrumentation. Comparable because it targets the same metrology, weights-and-measures, and field-calibration buyers as Seraphin, though with a heavier digital/software orientation.
• Troemner: Manufacturer of precision calibration weights, mass standards, and laboratory calibration instruments with NIST traceability. Comparable to Seraphin's lab calibration line (Series F/G graduate cylinders, slicker-plate provers) as a precision-measurement standard supplier serving metrology laboratories.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks6 records

Key highlights6 records

Customer concentration

• Xx.com/seraphinusa
• LinkedInlinkedin.com/company/seraphin-test-measure-co.

Compliance7 records

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about Seraphin