What Srs Amsterdam does

SRS Amsterdam B.V. is a specialty manufacturer and distributor of temperature sensing products and technical ceramics for the non-ferrous molten metal industry, headquartered at Kabelweg 34, Amsterdam, Netherlands. The company's core technology is Sialon (Syalon) — a silicon nitride-based advanced ceramic (Si3N4 composite with aluminum nitride and yttrium oxide) offering thermal shock resistance, high-temperature stability up to 1600°C, corrosion resistance, and non-wetting behavior in molten aluminum, copper, brass, and zinc. Its product portfolio spans three families: (i) Sialon components including thermocouple protection tubes (multiple engineered grades such as Syalon 050, 101, and 110), riser tubes for low-pressure die casting, heater tubes for degassing units (e.g., Alpur), electromagnetic pump (EMP) tubes, and custom special products; (ii) alternative thermocouple protection tubes in Silicon Carbide (SiC) and ceramic-coated Cast Iron for cost-sensitive applications; and (iii) Marshall thermocouples, which SRS Amsterdam distributes throughout Europe as the official distributor of LH Marshall (US-based manufacturer since 1928), offering ready-to-use Type K thermocouples usable up to 1350°C without preheating.

The company sells almost exclusively to industrial B2B customers — primary aluminum producers, secondary aluminum producers and recycling plants, non-ferrous smelters (copper, brass, zinc), and foundries — with global reach for the Stotek furnace spare parts business. All products are quote-based and engineered to application specification; pricing is not publicly disclosed, and contracts can extend across multi-year supply relationships. The company also supplies spare parts for Stotek dosing, holding, crucible, and shaft furnaces following Stotek's bankruptcy, monetizing the global installed base. SRS Amsterdam was founded in November 2003 by Petra Beckers as Super Red Sensors, reincorporated as a B.V. on January 1, 2006, and became a wholly owned subsidiary of the German family business Calsitherm Verwaltungs GmbH (Paderborn) on April 1, 2016. Go-to-market is sales-led, combining direct website-based quote requests, multi-language content marketing (English/German/Dutch), educational articles on Sialon/thermocouple technology, and a LinkedIn presence for industrial buyer engagement.

Name

Srs Amsterdam

Legal name

SRS Amsterdam B.V.

Website

https://srsamsterdam.com

Company type

Private

Founded year

2003

Operating status

Operating

Headcount range

1–10 employees

Short description

SRS Amsterdam B.V. manufactures and distributes Sialon (silicon nitride) technical ceramics, thermocouple protection tubes, and Marshall thermocouples for industrial temperature sensing in non-ferrous molten metal applications. It serves primary and secondary aluminum producers, recyclers, non-ferrous smelters, and foundries across Europe and globally.

Ownership category

akta.pro rank

Product category

Industrial Ceramics and Temperature Sensing Equipment

NAICS

Industrial Process Furnace and Oven Manufacturing (333994), Coating, Engraving, Heat Treating, and Allied Activities (33281)

SIC

Industrial Process Furnaces & Ovens (3567), Metalworkg Machinery & Equipment (3540)

akta.pro primary industry

Industrial Furnaces, Kilns & Thermal Processing Equipment (IMAHAEAE)

akta.pro secondary industry

Refractory & Metallurgical Consumables Distribution (Fluxes, electrodes, refractories) (IMAKAJAM)

Keywords

• Industrial ceramics manufacturing
• Thermocouple protection tubes
• Molten metal temperature sensing
• Sialon silicon nitride ceramics
• Foundry equipment supplies

Headquarters

HQ city

Amsterdam

HQ country

Netherlands

HQ region

Europe

Offices1 record

Markets served

GTM type

B2B

Offering type

Hardware or Manufacturing

Cost components

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

Revenue model

1. Temperature Sensing Products: Sale of thermocouple protection tubes (Sialon, Silicon Carbide, Cast Iron), Marshall thermocouples, and ceramic components for molten metal applications. Custom/tailor-made products available on request.
2. Sialon Ceramic Components: Sale of Sialon technical ceramic products including riser tubes, heater tubes, pump tubes, nozzles, and custom special products for non-ferrous molten metal processing.
3. Spare Parts for Stotek Furnaces: OEM replacement components for Stotek furnaces including nitride-bonded silicon carbide protection tubes and other parts, supporting continued operation of installed Stotek equipment following the manufacturer's bankruptcy.

Pricing tiers

Go-to-market motion2 records

Distribution channels2 records

Marketing channels4 records

Core offering

SRS Amsterdam manufactures and distributes temperature sensing and molten metal handling components for the non-ferrous metals industry. Its product range includes proprietary Sialon (silicon nitride) technical ceramics, thermocouple protection tubes in Sialon, Silicon Carbide, and Cast Iron materials, and LH Marshall ready-to-use thermocouples distributed officially across Europe. The company also produces Sialon riser tubes, heater tubes, electromagnetic pump tubes, custom ceramic components, and supplies spare parts for legacy Stotek furnaces.

Product overview

SRS Amsterdam is a specialized manufacturer and distributor of temperature sensing products and technical ceramics for the non-ferrous molten metal industry. The product portfolio centers on three main categories: (1) Sialon Technical Ceramics - advanced silicon nitride-based ceramics (also known as Syalon) offered as protection tubes, riser tubes, heater tubes, and pump tubes for molten metal applications; (2) Thermocouple Protection Tubes - available in Sialon, Silicon Carbide (SiC), and Cast Iron materials with ceramic coatings for various temperature and mechanical requirements; (3) Marshall Thermocouples - as official European distributor, offering LH Marshall ready-to-use thermocouples with Type K elements and graphite-coated chromium steel tubes. The company also provides spare parts for Stotek furnaces following the manufacturer's bankruptcy. Products serve primary and secondary aluminum producers, recycling plants, non-ferrous smelters, and foundries.

Differentiator

Problem solved

Functional benefit

Products and services

• Sialon Technical Ceramics Advanced Sialon (Silicon Nitride Si3N4) ceramics for molten metal applications, used for thermocouple protection tubes, riser tubes, heater tubes, pump tubes, and custom components in aluminum, copper, and brass melting furnaces.
• Sialon Thermocouple Protection Tubes Thermocouple protection tubes made from Syalon (Silicon Nitride) offering exceptional thermal shock resistance, high wear resistance, and non-wetting properties for molten metal temperature measurement.
• SiC Thermocouple Protection Tubes Silicon Carbide thermocouple protection tubes available in carbon-bonded SiC with steel inner tube and nitride-bonded SiC versions, offering exceptional thermal conductivity for harsh industrial environments.
• Cast Iron Thermocouple Protection Tubes Cast iron thermocouple protection tubes with ceramic enamel coating for aluminum and zinc melting furnaces, withstanding temperatures up to 875°C, available with ¾" NPT threading.
• Marshall Thermocouples Ready-to-use LH Marshall thermocouples consisting of chromium-steel tube (SS 446 / DIN 1.4749) with graphite coating and Type K (NiCr/Ni) thermowire, distributed officially across Europe. Usable up to 1350°C without preheating.
• Sialon Riser Tubes Sialon riser tubes for low-pressure die casting processes featuring integral flange design, high temperature resistance above 1200°C, wear resistance, and low thermal conductivity for efficient molten metal flow into casting molds.
• Sialon Heater Tubes Sialon immersion heater tubes for heating and temperature control of liquids and gases in industrial processes, particularly in degassing units such as Alpur degassers, featuring exceptional thermal stability and chemical resistance.
• Sialon Pump Tubes (EMP) Electromagnetic Pump (EMP) tubes for controlled molten metal flow via electromagnetic fields in furnaces, engineered for stirring, mixing, and temperature homogenization of molten metal.
• Sialon Special Products Custom-shaped Sialon ceramic components including nozzles, fluxing pipes, stopper and ring, level sensors, actuator rods, and extrusion dies for specialized molten metal processing and other industry applications.
• Spare Parts for Stotek Furnaces Replacement parts for Stotek furnaces including nitride-bonded silicon carbide protection tubes for heating elements, supporting Stotek dosing furnaces (Dosotherm DTI/DTE), holding furnaces (STE/STI), crucible furnaces, shaft furnaces, and transport ladles following Stotek's bankruptcy.

Quantifiable outcome

• Sialon 110 withstands continuous operation at 1450°C and peak loads up to 1600°C
• +3 more outcomes

Named customers6 records

Segments4 records

Ideal customer profiles5 records

Technology focussed Yes

API detail

Has API

No

API docs

API detail

Core technology

AI maturity

App detail

Feature10 records

Partnerships

One partnership is on record.

• LH MarshallcoreChannel Partner/ Reseller/ DistributorSRS Amsterdam serves as the official European distributor for LH Marshall thermocouples. LH Marshall has been producing temperature sensors since 1928 from their production facility in the United States. The Marshall thermocouple combines a chromium-steel tube (SS 446 / DIN 1.4749), graphite coating, and Type K thermowire, and is considered the market leader for non-ferrous applications with superior performance characteristics.

Scale indicators2 records

Recent moves8 records

Expansion highlights5 records

Broad incumbents

• Kanthal (Sandvik): Sandvik subsidiary producing heating elements, resistance wire, and high-temperature materials for industrial furnaces and thermal processing. Indirectly comparable as a supplier to the same foundry/metallurgical customer base, though focused on heating rather than temperature sensing.
• Morgan Advanced Materials: Global leader in advanced ceramics and engineered materials serving industrial, electronics, and metallurgical markets. Offers Sialon-type ceramics and high-temperature components overlapping with SRS, but as part of a much broader portfolio across many industries.
• CoorsTek: Major global technical ceramics manufacturer producing silicon carbide, silicon nitride, and Sialon components for industrial, semiconductor, and metallurgical applications. Comparable on ceramics technology, though broader in scope and geographically diverse.
• CeramTec: European advanced ceramics manufacturer offering silicon nitride, Sialon, and other technical ceramic components for industrial applications including molten metal processing. Comparable material technology but operates at much greater scale and across multiple end markets.
• Endress+Hauser: Global leader in industrial process measurement instrumentation, including temperature sensors and thermocouples for process industries. Indirect competitor through its broader temperature measurement portfolio, though not specialized in molten non-ferrous metals.
• Saint-Gobain Ceramics: One of the world's largest technical ceramics and refractory producers, supplying silicon carbide, silicon nitride, and other high-performance materials for industrial thermal processing, including metal production. Broader product range but overlapping Sialon/SiC offerings with SRS.

Direct peers

• ZIRCAR Ceramics: Specialty manufacturer of high-performance refractory and ceramic products including Sialon, alumina, and silicon carbide components for high-temperature industrial applications. Directly comparable as a niche specialist in thermal processing ceramics.
• Pyrotek: Global manufacturer of ceramic, refractory, and metallurgical consumables for the aluminum and non-ferrous metals industries, including Sialon-based products. Direct competitor to SRS in thermocouple protection tubes and foundry consumables serving primary/secondary aluminum producers and foundries.
• Heraeus Electro-Nite: Major supplier of immersion sensors, thermocouples, and analytical consumables for molten metal temperature and composition measurement in steel, iron, and non-ferrous applications. Direct competitor to SRS in providing ready-to-use temperature sensing solutions for foundries and smelters.

Others

• LH Marshall: US-based manufacturer of high-temperature thermocouples and temperature sensors (since 1928), whose products SRS Amsterdam distributes exclusively in Europe. A product partner/supplier relationship rather than direct competitor; comparable on the temperature sensing product line.

Market position

Strengths5 records

Weaknesses5 records

Competitive moat4 records

Key risks5 records

Key highlights6 records

Customer concentration

• LinkedInlinkedin.com/company/srsamsterdam

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 Srs Amsterdam