What SI Scientific Instruments does

SI Scientific Instruments GmbH is a privately held German limited liability company headquartered in Germany that operates exclusively as an official representative and authorized distributor of third-party measurement-technology manufacturers, most prominently Stanford Research Systems (SRS) and Liquid Instruments. The company carries no proprietary technology of its own; instead, its role is to import, sell, and provide value-added technical services (consulting, on-site demonstrations, repairs, calibration, equipment loans, installation) for a broad portfolio spanning lock-in amplifiers, photon counters, preamplifiers, temperature controllers, modular instrumentation (SRS SIM series with SIM900 mainframe and 20+ plug-in modules), and software-defined measurement platforms (Liquid Instruments Moku:Lab, Moku:Go, Moku:Pro, Moku:Delta). Its portfolio is organized into 12 product categories, including general metrology, analytics (NIR/Raman/UV-VIS spectrometers, mass spectrometers, potentiostats), detectors/MCPs/channeltrons, gas and vacuum technology, piezo drivers, physical measurement technology, spectroscopy and photonics, nanotechnology, and robotics/cobots.

The company serves research and measurement laboratories with 'highest demands' in Germany and the broader DACH region, based on its bilingual German/English website and primary physical presence. Its go-to-market is sales-led: dedicated sales engineers provide technical consulting and product demonstrations, supported by trade show presence and inbound inquiries via the website. Pricing is not publicly disclosed; customers must request quotes through contact forms or by phone (+49 8105 77940). Revenue mechanics are based on hardware sales (instrument distribution) supplemented by service revenue (calibration, repairs, installation). No public financials, funding rounds, parent entities, or management team information are disclosed in the source data, indicating a closely held, founder-or-family-led business model. Customer logos, headcount, geographic footprint beyond DACH, and AI/ML capabilities are not documented; the company is positioned as a specialized technical distribution intermediary rather than a technology developer or manufacturer.

Name

SI Scientific Instruments

Legal name

SI Scientific Instruments GmbH

Website

https://si-gmbh.de

Company type

Private

Operating status

Operating

Headcount range

1–10 employees

Short description

SI Scientific Instruments GmbH is a privately held German authorized distributor of precision measurement instruments for Stanford Research Systems and Liquid Instruments, serving research laboratories across the DACH region with technical consulting, calibration, and installation services.

Ownership category

akta.pro rank

Product category

Precision Measurement & Laboratory Instrumentation

NAICS

Analytical Laboratory Instrument Manufacturing (334516), Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Electronic and Precision Equipment Repair and Maintenance (811210)

SIC

Laboratory Analytical Instruments (3826), Industrial Instruments For Measurement, Display, And Control (3823), Measuring & Controlling Devices, Nec (3829)

akta.pro primary industry

Metrology, Calibration & Testing Equipment (Balances, pH/DO, Standards) (HLAGAIAL)

akta.pro secondary industries

Mass Spectrometry & Spectroscopy Instruments (HLAGAIAB), Analytical Instruments & Chromatography Systems (HLAGAIAA), Maintenance, Service Contracts & Equipment Repair (Field Service, Parts) (HLAGAIAN), Calibration Services & Standards (Calibration labs, reference standards, traceability services) (IMAGAFAH)

Keywords

• Scientific measurement instruments
• Lock-in amplifiers
• Modular measurement platforms
• Laboratory instrumentation distribution
• Software-defined test equipment

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

Personnel, Supply Chain, Operations, Marketing or Sales, Technology or R&D

Revenue model

1. Product Distribution and Sales: SI Scientific Instruments operates as an official representative and distributor of scientific measurement equipment. They carry all products from their manufacturer partners and provide technical consulting, demonstrations, repairs, calibrations, loan and test equipment, and on-site installations. The company generates revenue through the distribution and sale of measurement instruments and related services to research and laboratory customers.

Go-to-market motion1 record

Distribution channels1 record

Marketing channels3 records

Core offering

SI Scientific Instruments GmbH is the official distributor and representative in Germany for precision measurement and laboratory instruments from manufacturers such as Stanford Research Systems (SRS), Liquid Instruments, and ARI. The portfolio spans lock-in amplifiers, software-defined multi-instruments (Moku series), modular measurement platforms (SIM series), preamplifiers, photon counters, cryogenic temperature controllers, spectrometers, piezo actuators, and other laboratory instruments. Core services include technical consulting, on-site demonstrations, repairs, calibrations, loan equipment, and on-site installations for research and measurement laboratories.

Product overview

SI Scientific Instruments GmbH is a German distributor and official representative of precision measurement and laboratory equipment from manufacturers including Stanford Research Systems (SRS) and Liquid Instruments. The company serves research and measurement laboratories with the highest demands, offering technical consultation, demonstrations, repairs, calibrations, loan equipment, and on-site installation. The product portfolio is organized into twelve categories: (1) Actuators & Micromotors (piezo, magnetic, ultrasonic), (2) General Metrology (arbitrary/waveform generators, digitizers, frequency counters, LCR meters, spectrum/network analyzers), (3) Analytics (spectrometers including NIR, Raman, UV-VIS; mass spectrometers; gas analyzers; potentiostats/galvanostats; quartz crystal microbalances), (4) Detectors, MCPs & Channeltrons, (5) Gas & Vacuum Technology, (6) Helmholtz Coils, (7) Micromanipulators, (8) Nanotechnology (particle size analyzers, zeta potential analyzers), (9) Piezo Drivers & High Voltage, (10) Physical Measurement Technology (lock-in amplifiers, photon counters, boxcar averagers, temperature controllers), (11) Robotics (grippers, cobots), and (12) Spectroscopy & Photonics (laser diode drivers, light choppers, SERS substrates). The core product lines carried include the SRS SIM series (Small Instrumentation Modules) with the SIM900 mainframe and over 20 plug-in modules; SRS lock-in amplifiers (SR510, SR860, SR865A, SR830, SR844, SR2124); SRS preamplifiers (SR445A, SR446, SR550, SR551, SR552, SR554, SR555, SR556, SR560, SR570, SR600 series); and the Liquid Instruments Moku software-defined measurement platform (Moku:Delta with up to 2 GHz/8 channels, Moku:Pro with up to 600 MHz/4 channels, Moku:Lab, and Moku:Go). These product families span the full range from general-purpose benchtop instruments to specialized research-grade components for cryogenic, RF, and photonics applications.

Differentiator

Problem solved

Functional benefit

Products and services

• Moku:Delta 2U rack-mount software-defined 17-in-1 measurement instrument from Liquid Instruments with up to 8 inputs at 2 GHz / 5 GSa/s and 8 outputs at 2 GHz / 10 GSa/s, integrated GNSS clock, 32 DIO ports, Multi-Instrument Mode (up to 8 simultaneous slots), and Moku Cloud Compile for custom FPGA programming — for research laboratories requiring software-configurable oscilloscope, spectrum analyzer, lock-in amplifier, AWG, PID controller, logic analyzer, and related functionalities.
• Moku:Pro Software-configurable 17-in-1 high-end measurement instrument from Liquid Instruments with 4 inputs at 600 MHz / 5 GSa/s, 4 outputs at 500 MHz / 1.25 GSa/s, 0.3 ppm clock stability, Multi-Instrument Mode (up to 4 slots), and cloud-based Moku Cloud Compile for custom FPGA programming — targeted at advanced research and engineering labs.
• Moku:Lab Compact software-configurable 17-in-1 measurement instrument from Liquid Instruments with up to 200 MHz bandwidth, 500 MSa/s, ±5 V input range, 17 functions including oscilloscope, spectrum analyzer, function generator, lock-in amplifier (upgrade), and PID controller (upgrade) — suited to teaching labs and benchtop research use.
• Moku:Go Portable software-configurable 17-in-1 measurement instrument from Liquid Instruments (24 cm × 13 cm × 3.8 cm, 750 g) with 2 inputs DC-30 MHz and 2 outputs DC-20 MHz at 125 MSa/s, 12-bit resolution, optional 4-channel programmable power supply — for fieldwork, education, and portable test setups.
• SIM-Serie Modular Measurement Platform Flexible modular measurement platform from Stanford Research Systems comprising the SIM900 mainframe (8 plug-in module slots plus remote-control port, 10 MHz reference input, cascadable mainframes) and over 20 plug-in modules for preamplification, temperature monitoring, filters, PID control, frequency standards, and signal conditioning — for configurable rack-mounted laboratory setups.
• SR400 Dual-Channel Gated Photon Counter Dual-channel gated photon counter from Stanford Research Systems with up to 200 MHz count rate, 5 ns pulse-pair resolution, gated and continuous operating modes, gate scanning, built-in discriminators, and GPIB/RS-232 interfaces — for photon-counting, time-correlated single-photon counting, and laser detection applications.
• CTC100 Cryogenic Temperature Controller Cryogenic temperature controller from Stanford Research Systems with 4 sensor inputs, 2 heater outputs (up to 50 V / 100 W combined 150 W), up to 6 control loops, 4 analog and 8 digital I/O channels, 10 measurements/s data logging, and USB / Ethernet / RS-232 / GPIB interfaces — for low-temperature physics experiments.
• SR510 Analog Lock-In Amplifier Analog 100 kHz lock-in amplifier from Stanford Research Systems with 0.5 Hz to 100 kHz frequency range, current/voltage inputs, up to 80 dB dynamic reserve, tracking bandpass and mains filter, optional internal reference oscillator, 4 ADC inputs, 2 DAC outputs, and GPIB/RS-232 — for sensitive phase-sensitive detection in physics labs.
• SR830 Dual-Phase DSP Lock-In Amplifier 100 kHz dual-phase DSP lock-in amplifier from Stanford Research Systems with 1 mHz–102.4 kHz frequency range, >100 dB dynamic reserve, 5 ppm/°C stability, 0.001° phase resolution, time constants 10 µs–3 ks, measurement ranges 2 nV–1 V, and current inputs at 10⁶ or 10⁸ V/A — for high-performance phase-sensitive detection.
• SR860 500 kHz Two-Phase DSP Lock-In Amplifier 500 kHz two-phase DSP lock-in amplifier from Stanford Research Systems with 1 mHz–500 kHz frequency range, touchscreen, 1 µs–30 ks time constants, 2.5 nV/√Hz input noise at 1 kHz, >120 dB dynamic reserve, GPIB/RS-232/Ethernet/USB interfaces, HDMI video output, and Delta-f demodulation — for demanding laboratory phase-sensitive measurements.
• SR865A 4 MHz DSP Lock-In Amplifier 4 MHz DSP lock-in amplifier from Stanford Research Systems offering the highest-frequency phase-sensitive detection in the SR product line — for high-frequency spectroscopy and RF measurement labs.
• SR844 200 MHz Two-Phase Lock-In Amplifier 200 MHz two-phase lock-in amplifier from Stanford Research Systems with 25 kHz–200 MHz frequency range, 80 dB dynamic reserve, time constants 100 µs–30 ks, auto-gain/phase/reserve/offset, and switchable 50 Ω / 1 MΩ input impedance — for high-frequency phase-sensitive detection.
• SR2124 Analog Two-Phase Lock-In Amplifier Analog two-phase lock-in amplifier from Stanford Research Systems with 0.2–200 kHz frequency range, 100 nV–500 mV measurement range, harmonic detection (f, 2f, 3f), selectable input filters, RS-232/GPIB/Ethernet/fiber-optic interfaces, and automatic phase nulling — optimised for cryogenic physics and low-noise analog signal recovery.
• SR445A 350 MHz Preamplifier 350 MHz 4-channel pulse/preamplifier from Stanford Research Systems with DC–350 MHz bandwidth, 1 ns rise/fall time, 6.4 nV/√Hz input noise, voltage gain up to 625×, 50 Ω input/output impedance, cascadeable channels — for high-speed pulse and detector signal amplification.
• SR560 Low-Noise Voltage Preamplifier Low-noise voltage preamplifier from Stanford Research Systems with 4 nV/√Hz input noise, variable gain 1 to 50,000×, AC or DC coupling, and balanced/differential inputs — for cryogenic measurements, photomultiplier optical detection, audio development, and general laboratory use.
• SR570 Low-Noise Current Preamplifier Current preamplifier from Stanford Research Systems with 5 fA/√Hz input noise, sensitivity from 1 pA/V to 1 mA/V (1/2/5 stepping), adjustable bias voltage, two configurable input filters, variable input offset current, AC or battery operation, and RS-232 — for ultra-low-current photodetector and transducer measurements.
• SR446 400 MHz Programmable Preamplifier 400 MHz programmable preamplifier from Stanford Research Systems with differential output, 0.3 dB gain flatness, 3.3 nV/√Hz input noise at 1 MHz, voltage gain ×1–×100, four programmable lowpass filters (full/200/100/20 MHz), USB interface, and complementary output channels — for flexible high-bandwidth signal conditioning.
• SR600 Series Programmable Filter Units Programmable filter unit series from Stanford Research Systems with two independent filter channels, 115 dB/octave roll-off, 1 Hz–100 kHz range, 0.1 dB passband ripple, 6 nV/√Hz noise, variable gain up to 80 dB, and IEEE-488/RS-232 interfaces — for low-noise signal filtering (SR640 dual lowpass, SR645 dual highpass, SR650 bandpass).
• F-100TD Preamplifier/Discriminator Preamplifier/discriminator from ARI with digital threshold display, >50 MHz pulse repetition rate, 2 µA–4 mA input range, 50 dB linear transimpedance gain, 18 kΩ transimpedance, <0.4 µApp noise, 50 Ω impedance, and +5 V TTL output — for photon-counting and pulse discriminator applications with precise threshold control.

Segments1 record

Ideal customer profiles1 record

Technology focussed No

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Partnerships

Three partnerships are on record, tiered core and minor.

• Stanford Research Systems (SRS)coreChannel Partner/ Reseller/ DistributorSI Scientific Instruments is an official representative of Stanford Research Systems (SRS), carrying all SRS products including lock-in amplifiers (SR510, SR830, SR860, SR865A, SR844), photon counters (SR400), pre-amplifiers (SR445A, SR446, SR550, SR551, SR552, SR554, SR555, SR556, SR560, SR570, SR600 series), temperature controllers (CTC100, SR630, PTC10), and SIM series modular instrumentation. SRS products represent a significant portion of SI's measurement technology portfolio.
• Liquid InstrumentscoreChannel Partner/ Reseller/ DistributorSI Scientific Instruments is an official distributor of Liquid Instruments products including the Moku series of software-configurable measurement devices: Moku:Lab (17-in-1), Moku:Pro (17-in-1 High-End), Moku:Go (17-in-1 portable), and Moku:Delta (17-in-1 with 2 GHz bandwidth). These products feature software-defined instrumentation capabilities.
• ARI (Aerospace Research)minorChannel Partner/ Reseller/ DistributorSI Scientific Instruments distributes ARI products including the F-100TD pre-amplifier/discriminator with digital threshold display, used in photon counting and pulse applications.

Recent moves5 records

Expansion highlights4 records

Broad incumbents

• Thorlabs: Thorlabs is a US-headquartered, vertically integrated manufacturer and distributor of photonics, optomechanics, and measurement instrumentation. Comparable to SI because both sell precision laboratory measurement instruments (lock-in amplifiers, detectors, spectrometers) to research labs, but Thorlabs operates at much greater scale and across many geographies.
• National Instruments (NI): National Instruments (now NI, part of Emerson) is a global provider of modular measurement instruments and test software. Comparable to SI through overlap in modular measurement platforms (analogous to SI's SIM series representation), though NI is a much larger direct-sales manufacturer.
• Keysight Technologies: Keysight is a global leader in electronic measurement equipment (oscilloscopes, spectrum analyzers). Comparable to SI in that it supplies the underlying instrument categories SI distributes (spectrum/network analyzers, signal generators), but at much greater scale and with direct sales in the DACH region.
• Rohde & Schwarz: Rohde & Schwarz is a German-headquartered manufacturer of electronic test and measurement, broadcast, and radiocommunications equipment. Comparable to SI in measurement instruments overlap (spectrum analyzers, oscilloscopes, signal generators) and German market presence, but as a major global manufacturer rather than a distributor.

Direct peers

• Laser Components GmbH: Laser Components is a German distributor and manufacturer of laser, photonic, and optical measurement components. Directly comparable to SI as a DACH specialty distributor serving research laboratories with technical consulting and value-added services on third-party measurement technology.
• AMS Technologies: AMS Technologies is a German specialty distributor of measurement, optical, and power-electronic technology for research and industry. Closely comparable to SI as a DACH-based technical distributor carrying multiple non-overlapping manufacturer lines (spectrometers, lock-ins, photonics) and offering consulting and calibration services.
• Becker & Hickl GmbH: Becker & Hickl is a German manufacturer and supplier of photon counting, TCSPC, and single-photon detection modules. Comparable to SI as a Germany-based specialist serving the photon-counting and physical measurement research market with products adjacent to SI's SRS photon counter portfolio.
• SPECS GmbH: SPECS is a German manufacturer and supplier of surface analysis, spectroscopy, and electron detection instruments. Comparable to SI as a Germany-based scientific instrument specialist serving research laboratories with adjacent technologies (detectors, spectrometers, vacuum components).

Emerging players

• Zurich Instruments: Zurich Instruments is a Swiss manufacturer of lock-in amplifiers, impedance analyzers, and quantum measurement systems. Directly comparable to SI's SRS lock-in amplifier offering as a competing measurement technology source for European research labs, though it sells direct rather than through SI's channel.

Regional players

• Quantum Design Europe: Quantum Design is a European distributor of scientific and cryogenic measurement instruments (PPMS, lock-ins, temperature controllers). Closely comparable to SI as a regional European specialty distributor of high-end research instrumentation from US and global manufacturers.

Market position

Strengths4 records

Weaknesses4 records

Competitive moat3 records

Key risks5 records

Key highlights6 records

Customer concentration

• YouTubeyoutube.com/channel/UCxSI
• LinkedInlinkedin.com/company/si-scientific-instruments-gmbh

Revenue estimate

Valuation estimate

Number of profiles

Funding overview

Funding rounds

Investors

Funding detail is available on the Subscription and Enterprise plan.Contact sales →

M&A

Investments

M&A and investment is available on the Subscription and Enterprise plan.Contact sales →

Frequently asked questions about SI Scientific Instruments