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Additel: Pressure Calibrators, Digital Gauges,
and Hand Pumps

Transcat Carries the Full Line of Additel Products

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Additel Corporation is a leading global provider of pressure calibration tools. Industries look to Additel test tools and portable calibrators for high quality and handheld convenience. The company designs and manufactures automated pressure calibrators, digital pressure test gauges and calibrators, pressure test and calibration pumps, and other precision instruments that are pressure calibration staples in the field and in the lab.

Transcat distributes a full range of the innovatively engineered and affordably priced products from Additel and offers ISO 17025 accredited pressure calibration services on all Additel gauges and calibrators. We also carry the company’s accessories that support pressure calibration and measurement solutions for industry.

See All Additel Products Below

Additel Automated Pressure Calibration

Additel ADT761 Pressure CalibrationThe ADT761 series of calibrators perform automated pressure calibration in the field or the lab with high-level functionality. The 761 offers a revolutionary combination of pressure generation, control, and measurement in a compact package. Models come with an internal, high-performance electronic pump and precision pressure controller. No manual pressure generation is needed. They calibrate gauges, transmitters, and switches with superior accuracy. This portable calibrator series offers:

  • Pressure generation from 90% vacuum to 600 psi automatically
  • 0.005% FS pressure control stability and 0.02% FS accuracy
  • Additel ADT761-LLP for low pressure calibration
  • Additel ADT761-BP for barometric gauge calibration

The 761 series also features HART communication capability, supplies 24V loop power, and reads current or voltage.

Additel Digital Pressure Gauges

Additel 681Wide-ranging pressure solutions are found with the Additel ADT 681 Digital Pressure Gauges, which are available in four accuracy classes. Each user-friendly model features advanced microprocessors and silicon pressure sensors. The 681 models deliver temperature-compensated accuracy and reliability in more pressure applications. Use the precision gauge to perform field gauge calibration, as well as safety valve and regulator testing. The 681 model’s functionality includes: 

  • Pressure ranges to 40,000 psi
  • Eleven selectable pressure units
  • Large, easy-to-read, backlit display
  • Comprehensive data logging

Intrinsically safe versions of the Additel 681 gauges are also available.

Additel High Resolution Pumps

Additel ADT918 Pneumatic Pressure Test PumpGenerate pressure from 95 percent vacuum to 1,500psi with a lightweight, high-resolution pump that boasts an operator-focused design. The Additel ADT918 Pneumatic Pressure Test Pump features fine pressure adjustment capabilities and a shut-off valve that supports stability during calibration. Built for low maintenance, the hand-operated pump allows for easy connections and disconnections, with no wrench required!

Additel ADT920 High Pressure Test PumpThe Additel ADT920 High Pressure Test Pump shares the 918’s beneficial features and functionality. It is also a hand-operated pump, but with a pressure generation range up to 3,000psi, which can be reached quickly – in just 40 seconds. The 920 has an adjustment resolution up to 10 Pa. Both the Additel 918 and 920 serve as reliable comparison test pumps during the calibration of pressure gauges, transmitters, and other pressure instruments.

Add an Additel Device Now

Browse our extensive selection of Additel pressure instruments. To learn more about a specific product, you can connect with a Transcat representative through Live Chat, or call one of our experienced team members at 800-828-1470.

Product Promotions, Product Videos, & Application Note


Additel ADT22X Series


Additel 672 Digital Pressure Calibrator


Additel 681 Digital Pressure Gauge


Additel 761 Pressure Calibrator


Additel 901 & 912 Test Pumps


Additel 914 & 916 Test Pumps


Additel 919 High Pressure Pump


Additel 925 & 927 Pumps


Additel 936, 938, & 949 Pumps

Application Note - Calibrating a Pressure Switch

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  1. Additel ADT901-MK

    Maintenance kit for Additel 901 pump

    Order #: ADT901-MK

    Mfg #: ADT901-MK

    Ships in 3-4 weeks

    $36.00 USD
  2. Additel ADT160A-01-AP1KQ-PSI-N

    Digital Pressure Module 0 to 1K PSI, Absolute Pressure

    Order #: ADT160A-01-AP1KQ-PSI-N

    Mfg #: ADT160A-01-AP1KQ-PSI-N

    Ships in 3-4 weeks

    $8,795.00 USD
  3. Additel ADT160A-01-AP100Q-PSI-N

    Digital Pressure module 100 psi Absolute pressure, 1/4NPT M

    Order #: ADT160A-01-AP100Q-PSI-N

    Mfg #: ADT160A-01-AP100Q-PSI-N

    Ships in 3-4 weeks

    $7,995.00 USD
  4. Additel ADT160A-01-AP3KQ-PSI-N

    High Performance Pressure 0 to 3K PSI, Absolute Pressure

    Order #: ADT160A-01-AP3KQ-PSI-N

    Mfg #: ADT160A-01-AP3KQ-PSI-N

    Ships in 3-4 weeks

    $10,995.00 USD
  5. Additel ADT160A-02-CP100-PSI-N

    Digital Pressure mod, 0.02%FS -15 to 100 psi 1/4NPT M

    Order #: ADT160A-02-CP100-PSI-N

    Mfg #: ADT160A-02-CP100-PSI-N

    Ships in 3-4 weeks

    $1,035.00 USD
  6. Additel ADT160A-02-CP300-PSI-N

    Digital Press. Module -15-300 psi Compound pressure, 1/4NPT M

    Order #: ADT160A-02-CP300-PSI-N

    Mfg #: ADT160A-02-CP300-PSI-N

    Ships in 3-4 weeks

    $1,035.00 USD
  7. Additel ADT160A-02-GP1K-PSI-N

    Digital Pressure Module 0-1K PSIG, 1/4"NPTM, 0.02%FS

    Order #: ADT160A-02-GP1K-PSI-N

    Mfg #: ADT160A-02-GP1K-PSI-N

    Ships in 3-4 weeks

    $1,035.00 USD
  8. Additel ADT160A-02-GP5-PSI-N

    Digital Pressure Module 0-5PSIG, 1/4"NPTM, 0.02%FS

    Order #: ADT160A-02-GP5-PSI-N

    Mfg #: ADT160A-02-GP5-PSI-N

    Ships in 3-4 weeks

    $1,035.00 USD
  9. Additel ADT160A-02-GP50-PSI-N

    Gauge Pressure Module 0-50PSIG, 1/4"NPTM, 0.02%FS

    Order #: ADT160A-02-GP50-PSI-N

    Mfg #: ADT160A-02-GP50-PSI-N

    Ships in 3-4 weeks

    $1,035.00 USD
  10. Additel ADT761-LLP

    Automated Pressure Calibrator, -10"to 10"H2O

    Order #: ADT761-LLP

    Mfg #: ADT761-LLP

    In stock

    $14,800.00 USD
  11. Additel ADT761-M-N

    Automated Pressure Calibrator -13 to 375PSIG,1/4"NPTF

    Order #: ADT761-M-N

    Mfg #: ADT761-M-N

    Ships in 2-3 weeks

    $13,800.00 USD
  12. Additel ADT761-H-N

    Automated Pressure Calibrator -13 to 600PSIG,1/4"NPTF

    Order #: ADT761-H-N

    Mfg #: ADT761-H-N

    Ships in 2-3 weeks

    $15,800.00 USD
  13. Additel ADT761-MA-N

    Automated Pressure Calibrator 1.7 to 390PSIA,1/4"NPTF

    Order #: ADT761-MA-N

    Mfg #: ADT761-MA-N

    Ships in 2-3 weeks

    $14,800.00 USD
  14. Additel ADT920-N

    Pnuematic Calibration Pump -14 to 3000 psi 1/4NPT F Connector

    Order #: ADT920-N

    Mfg #: ADT920-N

    Ships in 2-3 weeks

    $3,947.00 USD
  15. Additel ADT761-L-N

    Automated Pressure Calibrator -13.5 to 100PSIG,1/4"NPTF

    Order #: ADT761-L-N

    Mfg #: ADT761-L-N

    Ships in 1-2 weeks

    $10,800.00 USD
  16. Additel ADT916-N

    Pneumatic Press Test Pump -14 psi to 600 psi

    Order #: ADT916-N

    Mfg #: ADT916-N

    Ships in 2-3 weeks

    $1,579.00 USD
  17. Additel ADT918-N

    Pneumatic Test Pump -14 psi to 1,500 psi

    Order #: ADT918-N

    Mfg #: ADT918-N

    Ships in 2-3 weeks

    $2,444.00 USD
  18. Additel ADT681-20-GP500-BAR-B

    Digital Pressure Test Gauge 0-35 bar gauge press 1/4BSPM

    Order #: ADT681-20-GP500-BAR-B

    Mfg #: ADT681-20-GP500-BAR-B

    Ships in 2-3 weeks

    $497.00 USD
  19. Additel ADT914-N

    Pneumatic Press Test Pump -14 psi to 375 psi

    Order #: ADT914-N

    Mfg #: ADT914-N

    Ships in 2-3 weeks

    $1,080.00 USD
  20. Additel ADT920-N for Rent

    Pneumatic Pump 3000 psi FLV $3795

    Order #: ADT920-N-RENT1

    Mfg #: ADT920-N-RENT1

    Call for Availability

    Call for Price

  21. Additel ADT761-HA-N

    Automated Pressure Calibrator 1.7 to 615PSIA,1/4"NPTF

    Order #: ADT761-HA-N

    Mfg #: ADT761-HA-N

    Ships in 3-4 weeks

    $16,800.00 USD
  22. Additel ADT761-H-N for Rent

    Automated Pressure Calibrator -0.90 bar to 40 bar FLV $15800

    Order #: ADT761-H-N-RENT1

    Mfg #: ADT761-H-N-RENT1

    In stock

    Call for Price

  23. Additel ADT761-D-N

    Automated Pressure Calibrator -13.5 to 15PSIG,1/4"NPTF

    Order #: ADT761-D-N

    Mfg #: ADT761-D-N

    Call for Availability

    $12,800.00 USD
  24. Additel ADT901-N

    Low Press Test Pump -6 psi to 6 psi

    Order #: ADT901-N

    Mfg #: ADT901-N

    Ships in 2-3 weeks

    $1,022.00 USD
  25. Additel ADT901-N-VIP

    Low Pressure Pump Kit,-6PSI to 6PSI

    Order #: ADT901-N-VIP

    Mfg #: ADT901-N-VIP

    Call for Availability

    $1,022.00 USD

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