Laboratory equipment and cryostat technology made of glass and metal for temperature control and insulation
KGW-Isotherm Karlsruher Glastechnisches Werk – Schieder GmbH
KarlsruheNew on Amplifa
About KGW-Isotherm
KGW-Isotherm is a manufacturer of laboratory equipment for temperature control and insulation made of glass and metal with over 70 years of experience. The product range includes more than 200 different Dewar vessels and cryogenic containers made of glass or metal for liquefied gases and other refrigerants, cold traps, over 360 different glass reaction vessels, as well as vacuum-insulated columns and heat protection vessels for data loggers in the range of -100°C to +300°C. Another core business is COLDGAS cryostat technology systems based on liquid nitrogen, which generate cold gas flows of up to -180°C and can control temperatures from +100°C to -196°C. Series products and custom-made individual items based on CAD design are produced in the company's own glassblowing workshop. The products are distributed worldwide, with established sales partners in many countries.
- Site
- Karlsruhe
- Processes
- Cold gas cooling systems (cryogenic tempering with liquid nitrogen), Cold gas system type T-G (cold gas flow up to -180°C), Cold gas system type TG-LKF (tempering chambers made of glass or metal, +100°C to -180°C), Cold gas system type TG-LKF-H (+100°C to -180°C), Cold gas system type TG-KKK (compact cryogenic cooling for small sample chambers), Cold gas system type TG-RD (direct cryogenic cooling of glass reaction vessels), Cold gas system type TG-RID (indirect cryogenic cooling of reaction vessels), Special cold gas systems TG-LKF-H-S1 / TG-LKF-H-S2 (e.g. chamber systems for notched-bar impact
- Materials
- Glass, Metal, V2A (stainless steel), Aluminium, Plastics
- Certificates
- Calibrated test and measuring equipment, He leak testing, Pressure testing
- Industries
- Laboratory and measurement technology, Chemicals, Pharmaceuticals, Food technology, Materials testing, Biotechnology
- 01
CAD design
- 02
Glassblowing workshop / metalworking
- 03
Vacuum insulation
- 04
Calibration and quality monitoring
- 05
Worldwide distribution
Materials & Processes
Glass
Main material for Dewar vessels, cold traps, reaction vessels and vacuum-insulated columns.
V2A (stainless steel)
Used for piping, siphons and vessels of the cold gas systems.
Aluminium
Frame structures of the cold gas reactor systems.
Plastics
Used in components of the cold gas and laboratory products.
Locations
Karlsruhe
DEHeadquarters, production and glassblowing workshop
- Materials
- Glass, stainless steel, aluminium
- Glassblowing workshop
- Cold gas systems (T-G, TG-LKF, TG-LKF-H, TG-KKK, TG-RD, TG-RID)
- Safety controller SC5
- He leak tester
- Pressure testing system with calibrated display device
- Ovens with calibrated tempering systems
Components & Products
Inside the production
Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Cold gas cooling systems (cryogenic tempering with liquid nitrogen)Engineering | Temperature stability < ±0.2°C (SC5), optimized up to ±0.1°C | – | – | – | Metal, Glass |
| Cold gas system type T-G (cold gas flow up to -180°C)Engineering | – | – | – | – | V2A |
| Cold gas system type TG-LKF (tempering chambers made of glass or metal, +100°C to -180°C)Engineering | ±0.1°C optimized / < ±0.2°C SC5 | – | – | – | Glass, Metal, V2A |
| Cold gas system type TG-LKF-H (+100°C to -180°C)Engineering | < ±0.2°C (SC5) | – | – | – | Glass, Metal, V2A |
| Cold gas system type TG-KKK (compact cryogenic cooling for small sample chambers)Engineering | < ±0.2°C (SC5) | – | – | – | Glass, Metal, V2A |
| Cold gas system type TG-RD (direct cryogenic cooling of glass reaction vessels)Engineering | approx. ±0.1°C (cascade controller) | – | – | – | Glass, V2A, Aluminium |
| Cold gas system type TG-RID (indirect cryogenic cooling of reaction vessels)Engineering | approx. ±0.1°C (cascade controller) | – | – | – | Glass, V2A, Aluminium |
| Special cold gas systems TG-LKF-H-S1 / TG-LKF-H-S2 (e.g. chamber systems for notched-bar impactEngineering | – | – | – | – | Glass, Metal |
| Safety controller SC5 for low-temperature cooling systems (+100°C to -196°C)Engineering | – | – | – | – | – |
| Manufacture of Dewar vessels and cryostats made of glass or metal (>200 variants)Casting | – | – | – | – | Glass, Metal |
| Manufacture of cold traps made of glass or metalCasting | – | – | – | – | Glass, Metal |
| Manufacture of glass reaction vessels (>360 variants)Casting | – | – | – | – | Glass |
| Glassblowing for custom-made vessels and glass partsCasting | – | – | – | – | Glass |
| Vacuum-insulated columns and heat protection vessels for data loggers (-100°C to +300°C)Casting | – | – | – | – | Glass, Metal |
| Cold shrink-fitting with LN2Heat treatment | – | – | – | – | – |
| CAD design / custom manufacturingEngineering | – | – | – | – | – |
13 Anlagen & Maschinen
| Machine | Manufacturer / model | Quantity | Working area | Year built | Site |
|---|---|---|---|---|---|
| Cold gas system type T-G50 | KGW-Isotherm T-G50 (Jet 500 W, LN2 1.1-11 l/h, V2A line 1.8 m, KF NW 50 siphon) | – | – | – | Karlsruhe |
| Cold gas system type TG-LKF 63/50 | KGW-Isotherm TG-LKF 63/50 (Heater 630 W, Jet 500 W, LN2 1.1-11 l/h) | – | – | – | Karlsruhe |
| Cold gas system type TG-LKF 63/100 | KGW-Isotherm TG-LKF 63/100 (Heater 630 W, Jet 1000 W, LN2 2.2-22 l/h) | – | – | – | Karlsruhe |
| Cold gas system type TG-LKF-H 63/50 / 63/100 | KGW-Isotherm TG-LKF-H 63/50, TG-LKF-H 63/100 | – | – | – | Karlsruhe |
| Cold gas system type TG-KKK 63/50 | KGW-Isotherm TG-KKK 63/50 (Heater 630 W, Jet 500 W, KF NW 40) | – | – | – | Karlsruhe |
| Cold gas system type TG-RD 40/50 | KGW-Isotherm TG-RD 40/50 (Jet 500 W, Heater 400 W, 2-litre reactor, V2A line 1.5 m) | – | – | – | Karlsruhe |
| Cold gas system type TG-RID 63/50 | KGW-Isotherm TG-RID 63/50 (Jet 500 W, Heater 630 W, 2-litre reactor) | – | – | – | Karlsruhe |
| Safety controller SC5 | KGW-Isotherm SC5 (with RS-485, LN2 vaporizer 100-1000 W) | – | +100°C to -196°C | – | Karlsruhe |
| LN2 container | KGW-Isotherm 20 to 300 litre volume | – | – | – | Karlsruhe |
| Glassblowing workshop | KGW-Isotherm | – | – | – | Karlsruhe |
| He leak tester | – | – | – | – | Karlsruhe |
| Pressure testing system with calibrated display device | – | – | – | – | Karlsruhe |
| Ovens with calibrated tempering systems | – | – | – | – | Karlsruhe |
Additional services
Quality
Regular quality monitoring of products and suppliers is ensured by calibrated vacuum measuring cells and tempering systems, He leak testers, and a pressure testing system with a calibrated display device.
| Evidence | Karlsruhe |
|---|---|
| Calibrated test and measuring equipment | |
| He leak testing | |
| Pressure testing |
History
Manufacturer of laboratory equipment for temperature control and insulation made of glass and metal for over 70 years