The Elcometer 331 probe heads and probes extend the functionality of the Elcometer 331 series and allow for precise adaptation to different measurement requirements. All components are fully interchangeable and can be changed quickly without the need to return the unit. System & Application Depending on the testing task, different probe heads are used – from standard measurements through closely spaced reinforcement to structures deep within the concrete. Borehole probes also enable the detection of prestressing tendons and multi-layer reinforcement at great depths. :contentReference[oaicite:0]{index=0} Variants & Applications TW33119124-1A – Standard probe head: Suitable for most applications, reliable location and cover measurement TW33119124-2A – High-resolution search head: Ideal for closely spaced reinforcing bars, precise at small spacings TW33119171A – Deep-penetration probe: For measuring reinforcement at great depths within the concrete structure TW33120014D – Dual probe (high-tensile / stainless steel): Specially designed for high-tensile steel and stainless steel (e.g. 304, 316, Duplex) TW33119223-1A – Borehole probe (short): Measuring range up to approx. 40 cm – ideal for precise depth localisation TW33119223-2A – Borehole probe (long): Measuring range up to approx. 100 cm – for deep reinforcement layers and tensioning ducts Technical specifications Compatibility: Elcometer 331 (BH, SH, TH, THD models) Measuring ranges depending on probe: approx. 5 mm to 180 mm (search heads) Borehole probes: up to 1,000 mm measuring depth Quick changeover without returning the unit Robust construction for site conditions Assistance with selection We are happy to assist you in selecting the right search heads and probes for your measurement task and application. Get advice now

The Elcometer 331HM half-cell meter is a professional testing instrument for assessing the corrosion condition of reinforcing steel in concrete. It enables the rapid and precise measurement of potential differences in orderto identify areas at risk of corrosion at an early stage. System & Application The half-cell measurement method is based on measuring electrical voltages between the reinforcing steel and a reference electrode on the concrete surface. The values obtained reliably indicate where corrosion is likely to occur or is already taking place. The device is ideal for structural inspections, maintenance work and the condition-based assessment of reinforced concrete structures. :contentReference[oaicite:0]{index=0} Features & Benefits Memory for up to 240,000 measurement values for detailed analysis Graphical evaluation and statistical functions directly in the device Simple one-handed operation via 4 function keys Data transfer to a PC or printer possible Compatible with CoverMaster™ software for report generation Interchangeable half-cell probes for flexible applications Technical specifications Measuring range: -999 mV to +999 mV Accuracy: ±5 mV Memory: up to 240,000 readings Operating temperature: 0 to 50 °C Power supply: Rechargeable battery (up to 32 hours’ runtime) Housing: robust & waterproof (IP65) Help with selection We are happy to assist you in selecting the right measuring device for assessing corrosion in concrete and steel structures. Get advice now

The Elcometer 331 Series (BH, SH, TH, THD) combines concrete cover measurement, rebar detection and half-cell measurement in a single high-performance tester. It enables the precise analysis of rebar location, concrete cover and corrosion risk in concrete structures and is ideal for inspection, maintenance and structural diagnostics. System & Application The instruments combine several testing methods in a single system: location and alignment of reinforcing steel, measurement of concrete cover, and assessment of corrosion potential using half-cell measurement. Graphical display and evaluation functions allow critical areas to be quickly identified and documented. :contentReference[oaicite:0]{index=0} Model overview W331BH--4 (Model BH): Entry-level model with half-cell measurement, without extended data memory W331SH--4 (Model SH): With data memory (up to 10 batches of 1,000 readings) and statistical functions W331TH--4 (Model TH): Extended memory with up to 240,000 measured values (grid and line mode) W331THD-4 (Model THD): As TH, additionally suitable for stainless steel and high-strength reinforcement Features & Benefits Combination of concrete cover meter and half-cell measurement Rapid location and determination of the reinforcement position Graphical display and limit value assessment Statistical analysis directly in the device One-handed operation via 4 function keys Interchangeable search heads and probes for flexible applications Robust, waterproof housing (IP65) Compatible with CoverMaster™ software for data analysis Technical specifications Half-cell measurement range: -999 mV to +999 mV Accuracy: ±5 mV Operating temperature: 0 to 50 °C Power supply: 7.4 V rechargeable battery (up to 32 hours’ runtime) Charging time: approx. 4 hours Dimensions: 230 x 130 x 125 mm Weight: approx. 1.6 kg Display: backlit graphic display Contents Elcometer 331 meter (depending on model: BH / SH / TH / THD) Probe connection cable Battery & charger (UK, US & EU) Earphones Shoulder strap Carrying case User manual (For SH, TH, THD models: software & PC cable) Help with choosing We are happy to assist you in selecting the right Elcometer 331 model for your testing and documentation requirements. Get advice now

The Elcometer 331B concrete cover meter is a reliable entry-level instrument for locating, aligning and measuring the depth of reinforcing steel in concrete. It enables the concrete cover to be determined quickly and accurately, thereby facilitating the safe planning of maintenance and repair work. System & Application The meter operates using a probe that is moved across the concrete surface and locates reinforcing bars via acoustic and visual signals. As soon as the sensor approaches a reinforcing bar, the signal strength increases and the concrete cover is displayed directly on the screen. Ideal for construction monitoring, renovation and non-destructive testing of concrete structures. Features & Benefits Fast and precise location of reinforcing steel Determination of position, orientation and concrete cover Large illuminated graphic display with signal strength indicator Simple one-handed operation via 4 function keys Multilingual menu navigation Interchangeable search heads for different applications Robust, waterproof housing (IP65) Technical specifications Operating temperature: 0 to 50 °C Power supply: 7.4 V rechargeable battery (up to 32 hours, approx. 20 hours with lighting) Charging time: approx. 4 hours Dimensions: 230 x 130 x 125 mm Weight: 1.6 kg Display: backlit graphic display Protection class: IP65 Contents Elcometer 331B Concrete Cover Meter Standard probe & connection cable Battery & charger (UK, US & EU) Earphones Shoulder strap Carrying case User manual Help with choosing We are happy to assist you in selecting the right concrete cover meter for your application and testing requirements. Get advice now