Verifying the integrity of every meter of seam in installed geomembrane to certify the watertightness of a dam, landfill, or leaching cell under environmental standards requires a needle pressure gauge with a metal body, clear dial reading, and robust construction for continuous field use. This needle pressure gauge —also called an air pressure tester, weld channel tester, or air pressure gauge tester— is manufactured by KORWINS with a metal body, stainless steel needle, and ergonomic wooden handle, designed for geomembrane installation contractors, hydraulic works supervisors, and environmental quality control technicians.

Key benefits

Industrial-grade metal body: robust construction sized for continuous field use, ambient humidity, quarry dust, and rough handling in sanitary landfills and mining, without losing calibration accuracy.
Precision stainless steel insertion needle: tip sized to penetrate cleanly into the air channel of the dual weld without compromising the material structure, a critical condition for non-destructive seam testing.
Clear, accurate dial reading: visible scale that allows pressure monitoring throughout the test cycle and immediate detection of any pressure drop indicative of a leak, an auditable condition for project certification.
Ergonomic wooden handle: comfortable, firm grip that facilitates the manual force needed for needle insertion and handling during continuous testing cycles on long seams.
Connection hose with quick coupling: high visibility and direct connection to portable air pumps or manual compressors, a condition for autonomous field operation without complex pneumatic equipment.

Typical applications and uses

Quality control during geomembrane installation: verifying watertightness meter by meter on dual-seam welds.
Environmental auditing of sanitary landfills and leaching cells under ISO 14001 or equivalent certification.
Verification of waterproofing in dams, reservoirs, artificial lakes, and large-format agricultural water storage.
Inspection of mining projects with leaching cells and chemical containment using structural HDPE or LLDPE.

Quality and durability

An economical field pressure gauge fails on two fronts: the initial calibration loses reliability after a few months of use (which produces false readings that invalidate later audits) and the insertion needle is made of low-grade steel that bends or rusts (which ruins the test on the first intensive use). KORWINS works with a calibrated metal body and a stainless steel needle, which separates a quality-control tester certifiable for auditing from a basic pressure gauge that certifies nothing.

Also known as: Technical: air pressure gauge tester, weld channel pressure tester, geomembrane watertightness tester, needle pressure test kit, dual seam pressure tester. In DR and Caribbean: manómetro de aguja, probador de soldadura, manómetro para geomembrana, tester de costura. In other countries: air pressure tester (USA), needle pressure gauge (USA), dual seam tester (USA), tester soldadura HDPE (LATAM), manómetro de aguja (LATAM, ES), probador de canal de aire (MX).

General
Pump type	Manual with support base
Indicator type	Analog pressure gauges
Resistencias y rendimiento
Test time	5 minutes
Riego y caudal
Working pressure	0.2 - 0.3 MPa (29.0 - 43.5 psi)

Machine: Ancho	18 cm (7.09 in)
Machine: Alto	90 cm (35.43 in)
Machine: Profundidad	10 cm (3.94 in)
Machine: Peso	3.0 kg

KORWINS® Pressure gauge with needle

Standard

Features

Packaging dimensions

KORWINS^® Pressure gauge with needle