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DeFelsko PosiTest LPD Low voltage Pinhole Detector

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Low voltage Pinhole Detector

The PosiTest LPD Low voltage Pinhole Detector detects holidays, pinholes and other discontinuities on metal and concrete substrates.

Simple

  • Easy-to-use interface with bright, multi-function LEDs
  • Ready to measure  both kits come with everything needed for testing
  • Audibly and visibly alerts when flaws are detected
  • Lightweight, ergonomic design

Durable

  • Rugged, environmentally sealed enclosure
  • Weatherproof, dustproof and shockproof  meets or exceeds IP65
  • Two year warranty

Accurate

  • Automatic self-test verifies voltage calibration
  • Regulated voltage outputs will not drop under load
  • Long Form Certificate of Calibration included
  • GroundSense visibly reassures the user that the instrument is properly grounded
  • Conforms to international standards including ISO, ASTM and NACE

Versatile

  • A wide range of adaptable sponge hardware for a variety of test configurations
  • Common threads and connectors allow for maximum flexibility
  • Headphone jack with included earbud for noisy environments
  • Uses 3 AAA alkaline or rechargeable batteries
  • 4 voltage output options conform to a variety of standards
Voltage 9V + / - 5 percent 67.5V + / - 5 percent 67.5V + / - 5 percent 90V + / - 5 percent
Sensitivity 90k + / - 3 percent 80k + / - 3 percent 90k + / - 3 percent 400k + / - 3 percent

 

PosiTest LPD Basic Kit

Includes everything needed for detecting pinholes using a rectangular sponge

  • Basic Kit comes complete with PosiTest LPD, base tube, 3 AAA batteries, rectangle sponge hardware, rectangle sponge, 4.5 m (15’) ground wire, insulating collar, ear bud, wrist strap, carabiner, Long Form Certificate of Calibration traceable to NIST, instructions, hard shell case, two year warranty
def lpd basic kit

PosiTest LPD Complete Kit

  Includes contents of the Basic Kit, plus adaptable sponge hardware and extension accessories in a hardshell case.

  Adaptable Sponge Hardware

  • Rectangle (Flat)
  • Roller
  • Internal Diameter
  • Additional 20 cm x 20 cm (8 x 8 inch) sheet sponge for custom usages
  • Wetting agent

  Extension Accessories

  • Extension rods provide an additional 0.6 m (2') of reach
  • Universal adapters to extend existing paint rollers and poles
  • 12 m (40') ground wire
  • 4.5 m (15') hot wire
  • Magnetic grounding post
PosiTest LPD Complete Kit

sponge hardwarelpd complete kit

Q. What is a pinhole detector?

A.  A pinhole detector is a non-destructive instrument for detecting discontinuities in a coating system including pinholes, cracks and thin spots. Other names include porosity detector, continuity tester, sponge tester and holiday detector.

There are two types of pinhole detectors, low voltage (wet sponge) and high voltage (spark tester). Low voltage detectors, like the PosiTest LPD, are typically used on coating systems less than 500 µm (20 mils) thick. High voltage spark testers operate at voltages up to 35,000V which can seriously harm the operator and damage the coating if the test is not correctly conducted. They tend to be more expensive and more complex than low-voltage pinhole detectors.

 

Q. What is measured?

A. A low-voltage pinhole test is performed by moving a moistened, electrified sponge over a non-conductive coating applied to a conductive substrate. The instrument is grounded or earthed to the conductive substrate, typically by clamping onto an uncoated area.

illustration of lpd

When the coating is continuous and no defects are present, electricity is unable to pass from the sponge to the substrate through the non-conductive coating. But when the electrified sponge encounters a flaw in the coating, electricity is able to flow into the substrate and travel back to the instrument through the ground wire, completing the circuit and setting off the audible and visible alarms.

 

Q. Why is porosity measurement important?

A. After a protective coating has been applied, it is important to ensure there are no defects or discontinuities present that expose the substrate beneath. Small areas of thin or missing coating, called pinholes or holidays, can become foci for corrosion and drastically reduce the life of a protective coating system. They can be invisible to the naked eye.

Porosity detectors are often used in applications where corrosion is difficult to monitor, or in aggressive service environments where performance of the protective coating is critical.

 

Q. How does it measure coatings on concrete?

A. When measuring coating thickness, concrete is not considered a conductive’substrate, as it is much less conductive than metal. However, concrete is still slightly conductive, and can carry enough current to allow low-voltage pinhole detectors to function. Therefore, for the purposes of low-voltage pinhole detection, concrete is considered a ‘conductive’ substrate.

The challenge when conducting low-voltage pinhole testing on concrete is to ensure the instrument is properly grounded. If there is exposed rebar or metal protruding from the concrete, this is the easiest solution. An alternative is to drive a metal rod (or piece of rebar) into the ground nearby the concrete to at least the depth of the slab, relying on the earth to conduct the electric current between the rod and the slab.

 

Q. What are the available options?

A. DeFelsko offers a Basic Kit, a Complete Kit and an Accessory Pack.

  • Basic Kit – Includes everything required to conduct a porosity test, in a hard-shell inspection case.
  • Complete Kit –Includes the contents of the Basic Kit, in addition to accessories to extend the reach and versatility of the PosiTest LPD.
  • Accessory Pack – Includes everything required to upgrade a Basic Kit to a Complete Kit.

Q. How is the PosiTest LPD different than other pinhole detectors?

A. The PosiTest LPD has been designed as a fully customizable unit and offers a number of features not typically found in other competitive instruments.

  • Lightweight  weighs less than most competitive products, reducing muscle strain and fatigue
  • Ergonomic design - while most other devices are box-shaped, the PosiTest LPD was specifically designed to fit comfortably in the hand with a balanced weight distribution
  • Easy-to-use  bright LEDs and simple 3-button operation with graphic icons
  • Calibrated (well-regulated) voltage outputs that will not drop under load. The PosiTest LPD is more likely to find small pinholes than other devices.
  • GroundSense visibly reassures the user that the instrument is properly grounded. Most competitive devices would not alert if the connection to ground is lost, resulting in undetected pinholes.
  • Common threads and connectors allow for unprecedented compatibility and customization. Customers can extend the reach of the PosiTest LPD with their own poles and extension rods.
  • All models include a hard shell case to conveniently carry the instrument and all accessories.
  • Includes Long Form Certificate of Calibration traceable to NIST
  • Two year warranty
  • IP65 ingress protection- dust and splash resistant. No other device is rated this highly.

Q. What is the purpose of the wetting agent?

A. Sometimes pinholes are so miniscule that water has difficulty reaching the conductive substrate underneath, especially on thicker coatings when the water must penetrate further into a pinhole to reach the substrate. In these instances, inspectors will use a surfactant (wetting agent) to lower the surface tension of the water, allowing the solution to better penetrate the pinhole.

 

Q. Is the new PosiTest LPD compatible with PosiSoft solutions?

A. No. The PosiTest LPD does not record any data.

 

Q. How is the PosiTest LPD calibrated at DeFelsko?

A. Each PosiTest LPD is calibrated at all test voltages with a load of known electrical resistance and a voltmeter, each traceable to a National Metrology Lab.

A Long Form Certificate of Calibration containing actual measured values is included with every instrument.

No other device provides this level of Certification.

 

Q. What is the recertification cost for the PosiTest LPD?

A. The cost to recertify is $ 95 and includes a Long Form Certificate of Calibration. Recertification usually takes one day.

 

PosiTest LPD Low voltage Pinhole Detector
LPDKITB PosiTest LPD Basic Kit
LPDKITC PosiTest LPD Complete Kit

 

PosiTest LPD Accessory Pack

PosiTest LPD Accessory Pack
Order Code:
LPDACCPK

Includes adaptable sponge hardware and accessories to convert the PosiTest LPD Basic Kit into a PosiTest LPD Complete Kit.

Adaptable Sponge Hardware

  • Roller
  • Internal Diameter
  • 20 cm x 20 cm (8 x 8 inch) sheet sponge for custom usages
  • Wetting agent

  Extension Accessories

  • Extension rods provide an additional 0.6 m (2') of reach
  • Universal adapters to extend existing paint rollers and poles
  • 12 m (40') ground wire
  • Magnetic grounding post
Replacement Sponges

  Rectangle Sponges (3 pack) — for use with rectangle sponge hardware

LPDSPONGESPK

  Roller Sponges (12 pack) — for use with roller sponge hardware

LPDSPONGERPK

  Sheet Sponges (3 pack) — for cutting custom shapes; 20 cm x 20 cm (8 x 8 inch)

LPDSPONGECPK
Extension Rod

Extension Rod
Order Code:
LPDEXTROD

Extend the PosiTest LPD base rod an additional 0.3 m (1')

  • Includes (1) extension rod
Note: Multiple extension rods can be connected together to further extend reach
Wetting Agent

Wetting Agent
Order Code:
LPDWET

  • Includes (1) 60mL bottle

Why use a wetting agent?
Sometimes pinholes are so miniscule that water has difficulty reaching the conductive substrate underneath, especially on thicker coatings when the water must penetrate further into a pinhole to reach the substrate. In these instances, inspectors will use a surfactant (wetting agent) to lower the surface tension of the water, allowing the solution to better penetrate the pinhole.

PosiTest LPD Verifier

PosiTest LPD Verifier
Order Code:
LPDVERIFY

  • For verification of electrical resistance
  • Includes decade box, cable and calibration verification procedure

Note: To verify voltage, a calibrated multimeter (not included) is required.

 

LPDKITB
POSITEST LPD BASIC KIT LOW VOLTAGE PINHOLE DETECTOR
Mfg. item #: LPDKITB
DEFLPDKITB
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$425.00

428
LPDKITC
POSITEST LPD COMPLETE KIT LOW VOLTAGE PINHOLE DETECTOR
Mfg. item #: LPDKITC
DEFLPDKITC
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$1,075.00

428
LPDACCPK
POSITEST LPD ACCESSORY PACK FOR LOW VOLT. PINHOLE DETECTOR
Mfg. item #: LPDACCPK
DEFLPDACCPK
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$650.00

428
LPDSPONGESPK
LPD RECTANGULAR SPONGE 3/PK
Mfg. item #: LPDSPONGESPK
DEFLPDSPONGESPK
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$12.00

428
LPDSPONGERPK
LPD ROLLER SPONGE 12/PK
Mfg. item #: LPDSPONGERPK
DEFLPDSPONGERPK
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$30.00

428
LPDSPONGECPK
LPD 8X8 SHEET SPONGE 3/PK
Mfg. item #: LPDSPONGECPK
DEFLPDSPONGECPK
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$25.00

428
LPDEXTROD
LPD EXTENSION ROD 305MM (12)
Mfg. item #: LPDEXTROD
DEFLPDEXTROD
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$50.00

428
LPDWET
LPD WETTING AGENT 60ML/BOTTLE 2/PK
Mfg. item #: LPDWET
DEFLPDWET
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$25.00

428
LPDVERIFY
LPD VERIFIER
Mfg. item #: LPDVERIFY
DEFLPDVERIFY
Free 2nd Day AIr for DEFELSCO orders over $599!1047
$650.00

428
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