Sauter HMO portable Leeb hardness tester, 170 to 960 HLD, touchscreen, memory for 500 values

The Sauter HMO is a portable Leeb hardness tester with an LCD touchscreen and touch pen. It measures metals from 170 to 960 HLD with a readability of 1 HL and converts the values to HV, HB, HRB, HRC and MPa. The device comes with a Li-ion rechargeable battery with mains adaptor, a memory for 500 values, a hardness reference block and a carrying case. The measurement data can be sent to a printer via the USB socket.

Touchscreen and automatic sensor detection

The HMO is operated via a touchscreen. The touch pen is included as standard. If a rebound sensor is connected, the device recognises it automatically. Type D is the intended sensor; type DC is available as an accessory (AHMO D and AHMO DC). As the direction of impact is set on the device, measurements can be taken in all directions (360°).

Measured values, statistics and limit values

According to Kern, the measurement accuracy is ± 1 % at 800 HLD (± 6 HLD). The device specifies the tensile strength for steel in the range from 375 to 2,639 MPa. The mini statistics display shows the measured value, the average value, the difference between the maximum and minimum values, and the date and time. A limit value function with an audible and visual signal supports series testing within a tolerance range. The device stores up to 500 values.

Test object and measurement limits

According to Kern, when using type D and type DC sensors, the test object must be at least 3 mm thick, with the sensor firmly coupled to a solid base. The minimum radius of curvature (concave or convex) is 50 mm; with a stabilising ring, it is 10 mm.

Rechargeable battery and power supply

The HMO runs on a built-in Li-ion rechargeable battery, which, according to Kern, lasts up to 50 h without backlight. Charging is carried out via the USB socket using the supplied mains adaptor (110 V to 240 V, EU plug); the charging time is approximately 8 h. The device switches off after 3 min of inactivity.

Typical applications

• Automotive industry: hardness checks on shafts and castings with documented measurement series
• Metalworking and steel construction: hardness testing of components with limit value monitoring
• Energy and power plant industry: on-site testing of plant components
• Oil and gas industry: hardness testing of fittings and pipework
• Aerospace: testing of metal components with a printed test report

The HMO is aimed at inspectors who want to measure series on site, set limit values and print out results directly.

Technical details

Scope of delivery

• Sauter HMO Leeb hardness tester with built-in Li-ion rechargeable battery
• Rebound sensor type D
• Hardness reference block
• Mains adaptor (EU plug)
• Touch pen
• Carrying case

Calibration

A factory calibration certificate (item no. 961-131) can be ordered separately. A separate factory calibration certificate (item no. 961-132) is available for the hardness reference block.

Warranty

According to Kern & Sohn, this device comes with a 3-year warranty. Kern grants 3 years on products with a list price of €500 or more and 2 years on products below that and on components; wear parts such as batteries and rechargeable batteries are excluded. Warranty repairs are carried out by Kern or by a Kern dealer.

Downloads

• Operating instructions Sauter HMO (PDF)

Regulatory information

As an electrical device, the hardness tester falls under the ElektroG. The manufacturer Kern & Sohn GmbH is registered under the WEEE registration number DE 80821200. How to return old appliances is described on the page Environment and disposal.

Individual requirements and procurement service

The AHMO D (type D) and AHMO DC (type DC) rebound sensors, the AHMO D02 (790 ± 40 HL) and AHMO D03 (630 ± 40 HL) hardness reference plates, the AHMR 01 support rings and the HMO-A04 cable are also available. Enquiries are handled via our procurement service.