SDT Ultrasound

LUBEChecker is an ultrasonic measurement device designed to optimise bearing lubrication by enabling grease replenishment based on bearing condition rather than fixed run-time intervals. It uses the LUBESense1 sensor and provides repeatable digital measurements to guide precision grease application. The instrument has a 35–42 kHz measurement bandwidth, -6 to 99.9 dBμV measuring range, 0.1 dBμV resolution and +30 to +102 dB signal amplification in 6 dB steps. It features a 160 × 128-pixel colour OLED display, one measurement channel through a 7-pole LEMO connector, five function keys and a 445 mm removable-sensor flexible rod. The ABS housing measures 158 × 59 × 38.5 mm, with a weight of 164 g. Powered by two AA batteries, it provides 7 hours of autonomy. LUBEChecker operates from -10°C to +50°C, carries an IP42 rating, and provides +83 dB SPL maximum output with the SDT headset.

LEAKChecker is an ultrasonic leak-detection solution designed to identify compressed-air and vacuum leaks in noisy industrial environments. The instrument uses ultrasound to help maintenance teams locate leaks quickly, addressing compressed-air losses that contribute to unnecessary energy consumption and operating costs. Designed for straightforward field inspection, LEAKChecker features a colour display and headset output for clear acoustic identification of leak sources. In combination with LEAKReporter, it provides a digital platform to detect, log and generate reports on leaks, including calculated losses and savings. The solution supports maintenance and sustainability initiatives by helping organisations identify energy-wasting leaks, quantify their impact and track improvements after corrective action.

TRAPChecker is an ultrasonic measurement device developed for assessing the condition of steam traps and valves by detecting the internal turbulence generated by defective traps and passing valves. It is designed to work across different steam-trap styles and failure modes and uses SDT’s RS1 Needle Sensor for inspection. The instrument operates across a 35–42 kHz measurement bandwidth, with a -6 to 99.9 dBμV measuring range, 0.1 dBμV resolution and +30 to +102 dB signal amplification in 6 dB steps. It features a 160 × 128-pixel colour OLED display, five function keys and one measurement channel through a 7-pole female LEMO connector. The ABS housing measures 158 × 59 × 38.5 mm, and the unit weighs 164 g. Powered by two AA batteries, it provides 7 hours of autonomy. TRAPChecker operates from -10°C to +50°C, carries an IP42 rating, and provides a maximum output of +83 dB SPL with the supplied 25 dB NRR Peltor HQ headset.

TIGHTChecker is an ultrasonic measurement device designed to verify the tightness of closed volumes and pinpoint leaks in vehicles, trains, aircraft, buildings, cleanrooms, tanks and ships. It operates with the SDT T-Sonic1 transmitter and Flexible Sensor, generating an ultrasonic signal inside the test volume so that leakage points can be located acoustically. The instrument has a 35–42 kHz measurement bandwidth, -6 to 99.9 dBμV measuring range, 0.1 dBμV resolution and +30 to +102 dB signal amplification in 6 dB steps. Its minimum sensitivity is -31 dB at 40 kHz, corresponding to a flow rate of up to 10⁻³ std. cm³/s. It provides a response time below 9 ms, a 160 × 128-pixel colour OLED display, five function keys and a 7-pole female LEMO connector. The ABS housing measures 158 × 59 × 38.5 mm, weighs 164 g, uses two AA batteries and provides 4 hours of autonomy. Rated IP42, it operates from -10°C to +50°C, with maximum output of +83 dB SPL through the supplied headset.

HATCHecker is an ultrasonic measurement device developed for hatch-cover tightness testing, enabling operators to verify the weathertight integrity of vessels and pinpoint the exact location of leaks. Designed for marine environments, the system uses SDT’s T-Sonic9 transmitter and ergonomic Flexible Sensor to generate and detect ultrasound across hatch-cover sealing areas. The instrument provides a 39.6–40.1 kHz measurement bandwidth, -6 to 99.9 dBμV measuring range, 0.1 dBμV resolution and +30 to +102 dB signal amplification in 6 dB steps. It has a response time below 9 ms, a 160 × 128-pixel colour OLED display, one measurement channel via a 7-pole female LEMO connector and five function keys. The ABS housing measures 158 × 59 × 38.5 mm and weighs 164 g. Powered by two AA batteries, it provides 7 hours of autonomy. HATCHecker operates from -10°C to +50°C, carries an IP42 rating, and has a minimum sensitivity of -31 dB at 40 kHz, corresponding to a flow rate of up to 10⁻³ std. cm³/s. It is supplied with a 25 dB NRR Peltor HQ headset and provides a maximum output of +83 dB SPL. For reporting, the system integrates with SHERLOGReporter and Sherlog Report Creator for hatch-cover, door and window test documentation.

ULTRAChecker is a versatile ultrasound measurement device designed to support both airborne and structure-borne ultrasound inspections across multiple industrial applications. It accepts SDT’s 2nd-generation ultrasound sensors, including FlexID2, LUBESense, RS2 Needle, AIRSense and ULTRASense, enabling inspections for air leaks, over-greased bearings, failed steam traps, electrical faults and passing valves. The instrument operates across a 35–42 kHz measurement bandwidth, with a -6 to 99.9 dBμV measuring range and 0.1 dBμV resolution. Signal amplification ranges from +0 to +102 dB in 6 dB steps, with five adjustable audio-amplification positions. It features a 160 × 128-pixel colour OLED display, a single measurement channel through a 7-pole LEMO connector and five function keys. The ABS housing measures 158 × 59 × 38.5 mm, weighs 164 g, and uses two AA batteries for up to 7 hours of autonomy. ULTRAChecker operates from -10°C to +50°C, has an IP42 rating, and provides a maximum output of +83 dB SPL with the SDT headset.

SDT340 is an advanced ultrasound and vibration data collector designed for comprehensive condition monitoring of industrial assets. It enables users to detect, trend and analyse ultrasound and vibration data across applications including bearing-condition monitoring, lubrication, compressed-air and gas leak detection, electrical fault detection, steam-trap testing, hydraulic-system monitoring, valve monitoring and tightness testing. The instrument supports time-waveform recording for up to 10 minutes and focUS Mode with sampling rates up to 256 kS/s, while its condition-indicator analysis includes RMS, Max RMS, Peak Value and Crest Factor. It supports time-signal, spectrum and split-screen views, historical trending and alarming, and off-route data collection through Ultranalysis Suite 3 (UAS3). The SDT340 accepts contact and airborne ultrasound sensors, accelerometers, an integrated infrared temperature sensor and tachometer. Its optional LUBExpert Mode, powered by the LUBrain algorithm, enables guided or free lubrication workflows, captures condition-monitoring data at up to 256 kS/s during lubrication, and logs every grease shot in UAS3 for traceability. SDT also provides the SDT340 with a Lifetime Warranty.

Vigilant is a permanent condition-monitoring system combining ultrasound and vibration analysis with embedded data-management software. It provides 8 dynamic channels for ultrasound/vibration and 4 auxiliary channels for temperature, tachometer and process inputs. The main dynamic inputs support sampling rates up to 51,200 Hz, while auxiliary inputs sample up to 200 Hz, with 16-bit ADC resolution and 110 dB dynamic range. Signal processing supports up to 12,800 spectral lines and 262,016 time-waveform samples. The system has 4 GB storage, Ethernet 10/100 connectivity and MODBUS TCP/IP, with optional OPC UA. It operates at 20–26 VDC, consumes <12 W, and measures 162 × 95 × 27 mm.