Name

Sigrist Photometer

Legal name

Sigrist-Photometer AG

Website

https://sigrist.com

Company type

Private

Founded year

1946

Operating status

Operating

Headcount range

101–250 employees

Ownership category

akta.pro rank

Product category

Process Photometry / Optical Measurement Instruments

NAICS

Navigational, Measuring, Electromedical, and Control Instruments Manufacturing (33451), Other Measuring and Controlling Device Manufacturing (334519), Analytical Laboratory Instrument Manufacturing (334516)

SIC

Industrial Instruments For Measurement, Display, And Control (3823), Optical Instruments & Lenses (3827)

akta.pro primary industry

Machine Vision & Optical Sensing (Cameras, 3D vision, LiDAR, illumination) (IMAGAFAB)

akta.pro secondary industry

Optical & Light Sensors (Photodiodes/ALS/Color/UV) (HDAHALAE)

Keywords

• Process photometry
• Turbidity measurement
• Optical instrumentation
• Water quality monitoring
• Brewery process control

Headquarters

HQ city

Ennetburgen

HQ country

Switzerland

HQ region

Europe

Offices2 records

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Hardware Sales — Process Photometers: Sale of optical measurement instruments including turbidity meters (TurBiScat, DualScat, LabScat, AquaScat), color measurement systems (ColorPlus), smoke/fire detectors (FireGuard), oil-in-water monitors (OilGuard), and control units (SiCon). Products are developed and manufactured in Switzerland to ISO quality standards. Revenue is generated through one-time product sales via direct channels and distribution partners.
2. Professional Services — Training, Implementation & Support: Technical support, training, and after-sales service provided through the global network of distribution and service partners. Sigrist demonstrates products on-site and supports customers with practical deployment. The company offers apprenticeships (electronics, logistics, polymechanics) and internship/praxis-integrated bachelor programs indicating investment in professional service delivery.

Go-to-market motion1 record

Distribution channels2 records

Marketing channels4 records

Core offering

Sigrist-Photometer AG develops, manufactures, and distributes high-quality optical process photometers and turbidity meters using proprietary flicker mirror and dual-beam technologies. Its products deliver continuous in-line measurement of turbidity, color, UV absorbance, oil-in-water, visibility, smoke, and dust for the brewing, water treatment, traffic/tunnel, and industrial process markets. All devices are developed and individually tested at the Ennetbürgen, Switzerland headquarters under ISO 9001:2015 quality standards and sold through a global network of distribution and service partners.

Product overview

Sigrist Photometer AG develops, manufactures, and distributes high-quality optical measurement instruments for water treatment, food/beverage industry, industrial processes, and traffic/environment applications. The portfolio centers on photometers and turbidity meters utilizing proprietary flicker mirror and dual-beam technology. Core products include the TurBiScat in-line process turbidity meter with dual-angle measurement, the LabScat 2 laboratory turbidity meter, and the AquaScat 2 family for water applications. The SiCon XX 40 series represents the latest control units providing centralized data display and configuration for multiple photometers. Additional offerings include color/absorption monitors (ColorPlus series), oil-in-water monitors (OilGuard), visibility monitors (VisGuard), smoke detectors (FireGuard), dust monitors (StackGuard), and microbiology monitors (BactoSense). All devices are developed and manufactured in Ennetbürgen, Switzerland, with individual testing per ISO 9000:2008 quality standards. The company employs approximately 75 people and serves customers in over 80 countries through a global network of distribution and service partners.

Differentiator

Problem solved

Functional benefit

Products and services

• TurBiScat In-line process turbidity meter using dual-angle scattered light measurement (90° and 25°) with optional color measurement (430 nm). Achieves 0.001 EBC resolution with ±0.001 EBC repeatability, response time under 2 seconds, MEBAK/EBC/ASBC compliance, range 0–1000 EBC. For breweries and beverage process monitoring.
• TurBiScat Ex PM 40 Explosion-proof variant of the TurBiScat for hazardous environments with ATEX certification, providing the same dual-angle turbidity and color measurement capabilities.
• LabScat 2 Two-angle laboratory turbidity meter for final quality assurance. Very wide measuring range (0–500 EBC), compact design, tool-free cleaning, dual-beam technology. Ideal for dark wheat beers and stable measurement at 0°C. For brewery laboratories.
• AquaScat 2 WTM Turbidity meter measuring in free-falling water jet for high resolution (0.001 FNU) and accurate measurement down to low turbidity values. Designed for drinking water treatment and distribution network monitoring, compliant with European Directive 2020/2184.
• AquaScat 2 HT Turbidity meter for liquid measurement applications in the AquaScat 2 product family.
• AquaScat 2 P Variant of the AquaScat 2 turbidity meter family for process applications.
• AquaScat S Turbidity measurement device for various industrial applications.
• PhaseGuard ST-40 Product guard/phase switch for monitoring brewing process phases and detecting phase transitions.
• TurbiGuard AD 40 Turbidity monitoring device for tracking filter performance and providing early warning of filter breakthrough in brewing applications.
• ColorPlus 2 Continuous UV absorbance measurement system at 254 nm for monitoring ozone reactor performance in water reuse and wastewater treatment applications. Features automatic cleaning every 3–4 hours to prevent biofilm growth.
• ColorPlus3 SAK 254 System for measuring spectral absorption coefficient (SAK) at 254 nm for water quality monitoring.
• ColorPlus3 Nitrate Nitrate measurement system for water quality monitoring applications.
• ColorMeter-Ex-PM-40 Explosion-proof absorption sensor and color sensor for industrial process monitoring.
• OilGuard 2 W Oil-in-water measurement device for monitoring hydrocarbon contamination in water streams.
• OilGuard PR 30 Oil measurement device for process monitoring applications.
• AquaDMS Comprehensive system for water quality monitoring integrating multiple sensors and measurement parameters.
• AquaMaster Water measurement instrument for various water treatment applications.
• VisGuard 2 Extractive Extractive visibility measurement system for tunnel and industrial applications.
• VisGuard 2 In-situ In-situ visibility measurement system for direct measurement in process streams.
• FireGuard 2 Smoke detector for road tunnel applications, providing early detection of smoke and fire events. 210 units deployed in the Gotthard road tunnel since September 2007.
• StackGuard Dust measurement device for monitoring particulate emissions from stacks and industrial processes. Qualified according to EN 14181 and EN 14956 QAL 1.
• ScrubberGuard Monitoring system for scrubber systems used in exhaust gas treatment.
• BactoSense Microbiology monitoring system for detecting and measuring microbial contamination in water and beverages.
• SIGAR2 Product guard and phase switch device for detecting product transitions in process pipelines.
• SiCon XX 40 Series (SiCon ST 40, SiCon AD 40, SiCon PM 40) Multi-channel control units for operating and displaying data from connected Sigrist photometers. Features 7" color touchscreen, scalable architecture (2 to 8 sensors), data logging capability, and cable lengths up to 800 m. ST 40 (Standard) connects up to 2 photometers, AD 40 (Advanced) handles up to 5 devices with 30-day data logger and export, and PM 40 (Premium) supports up to 8 sensors with 370-day data logger and full data management.
• SiDis AD 40 Display and operating unit for individual Sigrist photometers, providing a dedicated device for operating and displaying data from single measurement instruments.

Quantifiable outcome

• Turbidity resolution of 0.001 EBC with repeatability ±0.001 EBC and reproducibility ±0.02 EBC between devices
• +3 more outcomes

Named customers3 records

Segments4 records

Ideal customer profiles4 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature7 records

Partnerships

Five partnerships are on record, tiered core and minor.

• Filtrox AGcoreStrategic or Co-development Partner · 1 January 1946Filtrox AG (St. Gallen, Switzerland) commissioned Dr. Willy Sigrist to develop an online turbidity measuring device for monitoring filter effectiveness in beer filtration. This collaboration led to the development of the first online turbidity measuring device and the founding of Sigrist-Photometer AG in 1946. The two founders were connected through their shared time studying at the Polytechnic University of Zurich and a shared commitment to high-quality, reliable, and precise products.
• teqmaminorChannel Partner/ Reseller/ DistributorTeQMA is the Sigrist distribution partner in Spain, responsible for sales and support of Sigrist products in the Spanish market. TeQMA worked with Consorci d'Aigües de Tarragona (CAT) to renew its turbidimeters in anticipation of new European regulations (Directive 2020/2184).
• Hochschule Luzern (HSLU)minorStrategic or Co-development PartnerSigrist collaborates with Hochschule Luzern (University of Applied Sciences and Arts, Lucerne) as a cooperation partner in the PiBS program (Praxisintegriertes Bachelor-Studium) in the field of electrical engineering. Students have the opportunity to combine theoretical knowledge with practical experience and actively work in Sigrist's development team.
• BIZUN AssociationminorOthersSigrist-Photometer AG is a member of the BIZUN association, a Swiss business network for companies.
• SUVA (Swiss National Accident Insurance Institution)minorOthersSigrist is a member of the SUVA safety charter, demonstrating commitment to occupational safety.

Scale indicators4 records

Recent moves6 records

Expansion highlights5 records

Direct peers

• Xylem Analytics: Water-focused analytics and treatment business including turbidity, color, and UV absorbance monitoring products (brands include YSI, WTW, SI Analytics). Directly competes with Sigrist's water treatment portfolio across municipal drinking water and wastewater reuse customers.
• SWAN Analytische Instrumente AG: Swiss manufacturer of online water analyzers including turbidity, UV absorbance (SAC254), and color monitors. Same Swiss SME profile, same water-utility customer base, and directly comparable photometric technology - including products aimed at micropollutant monitoring like Sigrist's ColorPlus 2.
• Endress+Hauser: Swiss-headquartered global process instrumentation major offering turbidity, color, absorption, and photometric measurement within a much broader portfolio. Direct overlap with Sigrist in process photometric sensors, especially through its OPTEK brand and broader water & beverage coverage.
• Hach (Danaher): Global leader in water quality analysis with a broad turbidity meter portfolio including laboratory and process instruments. Hach directly competes with Sigrist's AquaScat family in drinking water and wastewater applications and serves overlapping municipal and industrial customers.
• OPTEK (Endress+Hauser): Inline UV-Vis and NIR process photometric sensors used in food, beverage, pharmaceutical, and chemical industries. OPTEK is now part of Endress+Hauser but operates as a distinct brand with a product approach (in-line photometric measurement for process streams) that closely mirrors Sigrist's.

Broad incumbents

• Emerson (Rosemount): Global process automation major with a Rosemount analytical portfolio covering liquid analysis (pH, conductivity, turbidity) and gas detection. Indirect overlap with Sigrist in process analytical sensors, but serving a much broader instrumentation mandate for industrial customers.
• ABB: Global process automation and instrumentation company with a Measurement & Analytics portfolio that includes optical and photometric analyzers for water, food, and chemical applications. Broader and more diversified than Sigrist but competes in similar end-markets for analytical measurement.
• Mettler-Toledo: Global precision instruments leader with a Process Analytics division offering in-line photometric, turbidity, color, and dissolved oxygen probes. Overlaps with Sigrist in brewing, water, and chemical process analytics but operates at much greater scale and portfolio breadth.
• Krohne: Process measurement specialist with strong flow metering roots that has expanded into analytical instruments including optical and turbidity sensors for water and process industries. Comparable in being an independent European mid-sized instrumentation firm but with broader product breadth than Sigrist.
• Yokogawa Electric: Process automation and analytical instrumentation major offering turbidity, pH, conductivity, and optical sensors for industrial process control. Indirect overlap with Sigrist via its analytical instrumentation portfolio, but addresses a much broader set of process variables and industries.

Market position

Weaknesses5 records

Competitive moat6 records

Key risks5 records

Key highlights6 records

Customer concentration

• Xx.com/sigristgmbh

Compliance10 records

Revenue estimate

Valuation estimate

Number of profiles

Profiles8 records

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 Sigrist Photometer