Elcometer 118 Surface Moisture Meter
| Origin | USA |
|---|---|
| Manufacturer Type | Authorized Distributor |
| Origin Category | Imported |
| Model | Elcometer 118 |
| Pricing | Available Upon Request |
Overview
The Elcometer 118 Surface Moisture Meter is a portable, analog-based instrument engineered for rapid, non-destructive assessment of surface moisture content in common construction and finishing substrates. It operates on the principle of electrical resistance measurement: when the interchangeable electrode pins are pressed firmly against a material’s surface, a low-voltage DC current passes between them, and the resulting resistance—correlated to moisture-induced ionic conductivity—is translated into a visual reading on a calibrated analog scale. Unlike digital meters that require interpretation of numerical thresholds, the Elcometer 118 delivers immediate qualitative feedback through intuitive color-coded zones (green = acceptable/low moisture; red = elevated/high moisture), making it especially suited for field technicians, coating inspectors, and flooring installers who require fast go/no-go decisions prior to paint application, adhesive bonding, or floor covering installation.
Key Features
- Lightweight, handheld design optimized for extended field use without operator fatigue
- Analog needle display with dual-color calibration zones (green for safe moisture levels; red for cautionary thresholds)
- Five dedicated substrate-specific scales: Wood Scale 1 (softwoods), Wood Scale 2 (hardwoods), Plaster, Concrete, and Linear Reference (for comparative analysis only)
- Interchangeable electrode pins — replaceable and configurable for varying surface hardness and penetration depth requirements
- No battery dependency: fully passive operation ensures consistent performance across temperature ranges from –10 °C to +50 °C
- Integrated wood species reference chart included in the user manual to support accurate scale selection for timber substrates
Sample Compatibility & Compliance
The Elcometer 118 is validated for use on flat, non-metallic, non-porous to semi-porous surfaces including cured concrete slabs, gypsum plaster, drywall, and dimensional lumber. Its resistance-based methodology conforms to the fundamental principles outlined in ASTM D4263 (“Standard Test Method for Indicating Moisture in Concrete by the Plastic Sheet Method”) as a supplementary screening tool, and aligns with industry best practices referenced in SSPC-SP11 and ISO 8502-6 for pre-coating moisture evaluation. While not a quantitative gravimetric device, it meets functional requirements for preliminary moisture screening under ISO 15184 (paint adhesion testing) and supports quality assurance workflows compliant with ISO 9001:2015 clause 8.5.1 (control of production and service provision). Note: Not intended for use on metal, highly conductive, or sealed surfaces (e.g., epoxy-coated concrete).
Software & Data Management
As a purely analog, battery-free instrument, the Elcometer 118 does not incorporate onboard memory, Bluetooth connectivity, or software integration. Its design prioritizes operational simplicity and reliability in environments where electromagnetic interference, dust, or moisture exposure may compromise digital electronics. All readings are real-time and unrecorded—consistent with traditional inspection protocols requiring immediate visual verification and manual documentation in field logs or coating inspection reports (e.g., NACE RP0188, ISO 12944-5 Annex B). For traceability, users are advised to record scale selection, substrate type, environmental conditions (ambient RH and temperature), and observed needle position in accordance with internal QA/QC procedures or client-mandated reporting formats.
Applications
- Preliminary moisture screening of concrete floors prior to moisture-sensitive flooring installation (e.g., vinyl composition tile, hardwood, or resinous coatings)
- Verification of drying progress in plaster and gypsum-based wall systems before skim coating or wallpapering
- Rapid assessment of wood moisture gradients during joinery, cabinetry, or structural timber preparation
- Field-level compliance checks per manufacturer-specified moisture limits for primers, sealers, and high-build coatings
- Training and competency demonstration for new inspectors due to its tactile feedback and visual immediacy
FAQ
Does the Elcometer 118 provide quantitative moisture content values (e.g., %MC)?
No. It delivers qualitative, scale-relative indications aligned to substrate-specific resistance thresholds—not absolute moisture percentages. For gravimetric or capacitance-based quantification, refer to the Elcometer 530 or 750 series.
Can the Elcometer 118 be used on painted or sealed surfaces?
No. The electrode pins require direct contact with the substrate’s porous matrix. Sealed, coated, or laminated surfaces will yield unreliable or false-low readings.
How often should the electrode pins be replaced?
Pins should be inspected before each use for wear or corrosion. Replacement is recommended after approximately 5,000 penetrations or upon visible deformation—especially when testing abrasive substrates such as rough-cast concrete.
Is calibration required or supported?
The Elcometer 118 is factory-calibrated and contains no user-adjustable calibration mechanism. Verification can be performed using the supplied reference test block or certified moisture standards per Elcometer Technical Bulletin TB-118-01.
What environmental conditions affect accuracy?
Extreme ambient temperatures ( +50 °C) and relative humidity > 90% RH may influence pin contact resistance. Always perform measurements at equilibrium temperature and document ambient conditions in inspection reports.
