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The STMH1 Rebound Concrete Test Hammer is the quickest, simplest and least expensive method for (NDT) non destructive evaluation of compressive strength of concrete and other masonry materials. Also referred to as a mechanical concrete rebound test hammer, swiss hammer & sclerometer, It is most ideally suited for assessment of material uniformity over large areas of structure to delineate the zones or areas of poor quality or deteriorated concrete present in the structures.
It provides a measure of relative material surface hardness and is used extensively for the testing of concrete and rock. The hammer consists of a spring loaded plunger which when released, strikes the surface. During the rebound stroke, the mass moves a pointer providing a reference value on the scale called the rebound number. This number, when converted based on correlation table, gives the compression resistance value in respect of the impact angle.
The N type Concrete Rebound hammer should be used for concrete substrates of thickness 100mm or more. The abrasive stone provided as part of supply should be used to smoothen the surface. Each test location should be tested with 10 impacts in a grid or as per standard followed (minimum 9 values) spaced 25mm apart or higher. The average value of the R rebound value should be noted & correlated using conversion curve (Max & Min values should be be within 80% of range of hammer test results).
The STMH1 Mechanical rebound test hammer for concrete testing, is possibly the highest quality instrument available for its purpose, and is engineered based on an all aluminum body with a 4 layer protective coating for ensuring against oxidization ; Inside parts are High tensile steel springs , Stainless steel centre rod, “EN” mass with hard chrome plating , Zinc rails – every component of the instrument is designed and made to exacting standards to ensure that the instrument provides the highest level of repeatability during measurements and durability.
Each instrument is duly tested, after manufacturing, on calibrated anvil, and with repeated impacts for checking functionality, prior packing. Accordingly, pre dispatch documented test results, provided with each instrument.
The STMH1 hammer is manufactured by asian contec limited, under its value brand STANONE.
| Standards & Regulations | BS 1881, part 202 Great Britain |
| DIN 1048, part 2 Germany | |
| ASTM C 805 USA | |
| ASTM D 5873 ( Rock ) USA | |
| NFP 18-417 France | |
| B 15-225 Belgium | |
| JGJ/ T 23-2001 China | |
| IS 13311-2 India | |
| IS 516 India | |
| ISO/DIS 8045 International | |
| EN 12504-2 Europe | |
| ENV 206 Europe | |
| JJG 817-1993 China |
| Impact energy | (Type N) 2.207Nm |
| Concrete compressive strength range | 10 to 70 N/mm2, 10 to 110 N/mm2 possible via customized curves |
| Display Indicator | Graduated mechanical scale |
| Hammer mass | 370grams |
| Spring extension | 76mm |
| Dimension of housing | Length: 275mm, Dia 55mm |
| Weight | 1090grams |
The STMH1 Type N is a non-destructive testing (NDT) instrument used to estimate the compressive strength, uniformity, and quality of hardened concrete without damaging the structure.
The STMH1 operates with 2.207 Joules (Type N impact energy), making it suitable for testing standard structural concrete in buildings, bridges, columns, beams, and slabs.
The STMH1 is suitable for testing concrete with compressive strengths ranging approximately from 10 MPa to 70 MPa, covering most construction and infrastructure applications.
The STMH1 provides rebound values on a scale of 10 to 100, which are correlated to concrete compressive strength using standard conversion charts.
The STMH1 is designed to provide consistent and repeatable rebound readings with a typical system accuracy of ±2 rebound numbers under standard testing conditions.
No. The STMH1 is a fully mechanical rebound hammer, requiring no batteries, charging, or external power supply.
The STMH1 follows internationally accepted testing methodologies aligned with ASTM C805, EN 12504-2, IS 13311 (Part 2), and BS 1881 standards for rebound hammer testing.
Yes. The hammer can be used on walls, columns, beams, ceilings, and slabs, with appropriate angle correction factors applied as per testing standards.
The 2.207 J impact energy provides sufficient penetration and rebound response for standard reinforced concrete structures, ensuring reliable strength estimation.
Yes. Periodic verification using a calibration anvil (typically 80 ± 2 rebound value) is recommended to maintain testing accuracy and standards compliance.
The STMH1 is designed as a lightweight handheld instrument, typically weighing around 1 kg, allowing easy field operation and portability.
Yes. It is widely used for concrete quality checks, curing assessment, acceptance testing, and routine site inspections.
Yes. It is suitable for evaluating concrete quality in bridges, tunnels, dams, highways, industrial plants, and commercial structures.
Key advantages include 2.207 J Type N impact energy, mechanical operation, ASTM/EN/IS compliance, no battery requirement, lightweight design, rapid testing, low maintenance, and reliable concrete strength estimation.
The STMH1 Type N is a non-destructive testing (NDT) instrument used to estimate the compressive strength, uniformity, and quality of hardened concrete without damaging the structure.
The STMH1 operates with 2.207 Joules (Type N impact energy), making it suitable for testing standard structural concrete in buildings, bridges, columns, beams, and slabs.
The STMH1 is suitable for testing concrete with compressive strengths ranging approximately from 10 MPa to 70 MPa, covering most construction and infrastructure applications.
The STMH1 provides rebound values on a scale of 10 to 100, which are correlated to concrete compressive strength using standard conversion charts.
The STMH1 is designed to provide consistent and repeatable rebound readings with a typical system accuracy of ±2 rebound numbers under standard testing conditions.
No. The STMH1 is a fully mechanical rebound hammer, requiring no batteries, charging, or external power supply.
The STMH1 follows internationally accepted testing methodologies aligned with ASTM C805, EN 12504-2, IS 13311 (Part 2), and BS 1881 standards for rebound hammer testing.
Yes. The hammer can be used on walls, columns, beams, ceilings, and slabs, with appropriate angle correction factors applied as per testing standards.
The 2.207 J impact energy provides sufficient penetration and rebound response for standard reinforced concrete structures, ensuring reliable strength estimation.
Yes. Periodic verification using a calibration anvil (typically 80 ± 2 rebound value) is recommended to maintain testing accuracy and standards compliance.
The STMH1 is designed as a lightweight handheld instrument, typically weighing around 1 kg, allowing easy field operation and portability.
Yes. It is widely used for concrete quality checks, curing assessment, acceptance testing, and routine site inspections.
Yes. It is suitable for evaluating concrete quality in bridges, tunnels, dams, highways, industrial plants, and commercial structures.
Key advantages include 2.207 J Type N impact energy, mechanical operation, ASTM/EN/IS compliance, no battery requirement, lightweight design, rapid testing, low maintenance, and reliable concrete strength estimation.
The STMH1 Type N is a non-destructive testing (NDT) instrument used to estimate the compressive strength, uniformity, and quality of hardened concrete without damaging the structure.
The STMH1 operates with 2.207 Joules (Type N impact energy), making it suitable for testing standard structural concrete in buildings, bridges, columns, beams, and slabs.
The STMH1 is suitable for testing concrete with compressive strengths ranging approximately from 10 MPa to 70 MPa, covering most construction and infrastructure applications.
The STMH1 provides rebound values on a scale of 10 to 100, which are correlated to concrete compressive strength using standard conversion charts.
The STMH1 is designed to provide consistent and repeatable rebound readings with a typical system accuracy of ±2 rebound numbers under standard testing conditions.
No. The STMH1 is a fully mechanical rebound hammer, requiring no batteries, charging, or external power supply.
The STMH1 follows internationally accepted testing methodologies aligned with ASTM C805, EN 12504-2, IS 13311 (Part 2), and BS 1881 standards for rebound hammer testing.
Yes. The hammer can be used on walls, columns, beams, ceilings, and slabs, with appropriate angle correction factors applied as per testing standards.
The 2.207 J impact energy provides sufficient penetration and rebound response for standard reinforced concrete structures, ensuring reliable strength estimation.
Yes. Periodic verification using a calibration anvil (typically 80 ± 2 rebound value) is recommended to maintain testing accuracy and standards compliance.
The STMH1 is designed as a lightweight handheld instrument, typically weighing around 1 kg, allowing easy field operation and portability.
Yes. It is widely used for concrete quality checks, curing assessment, acceptance testing, and routine site inspections.
Yes. It is suitable for evaluating concrete quality in bridges, tunnels, dams, highways, industrial plants, and commercial structures.
Key advantages include 2.207 J Type N impact energy, mechanical operation, ASTM/EN/IS compliance, no battery requirement, lightweight design, rapid testing, low maintenance, and reliable concrete strength estimation.
The STMH1 Type N is a non-destructive testing (NDT) instrument used to estimate the compressive strength, uniformity, and quality of hardened concrete without damaging the structure.
The STMH1 operates with 2.207 Joules (Type N impact energy), making it suitable for testing standard structural concrete in buildings, bridges, columns, beams, and slabs.
The STMH1 is suitable for testing concrete with compressive strengths ranging approximately from 10 MPa to 70 MPa, covering most construction and infrastructure applications.
The STMH1 provides rebound values on a scale of 10 to 100, which are correlated to concrete compressive strength using standard conversion charts.
The STMH1 is designed to provide consistent and repeatable rebound readings with a typical system accuracy of ±2 rebound numbers under standard testing conditions.
No. The STMH1 is a fully mechanical rebound hammer, requiring no batteries, charging, or external power supply.
The STMH1 follows internationally accepted testing methodologies aligned with ASTM C805, EN 12504-2, IS 13311 (Part 2), and BS 1881 standards for rebound hammer testing.
Yes. The hammer can be used on walls, columns, beams, ceilings, and slabs, with appropriate angle correction factors applied as per testing standards.
The 2.207 J impact energy provides sufficient penetration and rebound response for standard reinforced concrete structures, ensuring reliable strength estimation.
Yes. Periodic verification using a calibration anvil (typically 80 ± 2 rebound value) is recommended to maintain testing accuracy and standards compliance.
The STMH1 is designed as a lightweight handheld instrument, typically weighing around 1 kg, allowing easy field operation and portability.
Yes. It is widely used for concrete quality checks, curing assessment, acceptance testing, and routine site inspections.
Yes. It is suitable for evaluating concrete quality in bridges, tunnels, dams, highways, industrial plants, and commercial structures.
Key advantages include 2.207 J Type N impact energy, mechanical operation, ASTM/EN/IS compliance, no battery requirement, lightweight design, rapid testing, low maintenance, and reliable concrete strength estimation.
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