
Manufacturer of bimetal thermometers, gas-actuated thermometers, hygrometers, pressure gauges and thermowells to DIN.
Franz Wagner & Sohn GmbH (BITHERMA)
Lemgo (DE)New on Amplifa
About BITHERMA
Franz Wagner & Sohn GmbH sells its measuring instruments under the BITHERMA brand and has been manufacturing bimetal thermometers, gas-actuated thermometers, machine and glass thermometers as well as Pt 100 resistance thermometers since 1985. In 2001, the company Dippel & Götze was acquired and production was expanded to include hygrometers and thermo-hygrometers, including for dew-point, surface and duct measurement. The product range also includes Bourdon tube, diaphragm, capsule, differential pressure and U-tube pressure gauges as well as valves and accessories such as shut-off cocks, compression unions and clamp flanges. In the thermowell sector, the company manufactures screw-in, weld-in and flanged thermowells to DIN 43772 in various shapes and materials, also as custom-made products. Acceptance test certificates for many material grades are issued on request. Customers come from industries such as chemicals, food, heating/HVAC, construction and laboratory. The company is located in Lemgo in East Westphalia-Lippe.
- Site
- Lemgo
- Processes
- Manufacture of bimetal thermometers (dial thermometers, bottom-connected thermometers,, Manufacture of gas-actuated thermometers (standard and chemical versions, filled with inert gas), Manufacture of glass thermometers (machine, heating, laboratory and chemical glass thermometers to, Manufacture of Pt 100 resistance thermometers, Manufacture of hygrometers and thermo-hygrometers (dew-point, surface, duct measurement), Manufacture of pressure gauges (Bourdon tube, diaphragm, capsule, differential pressure, U-tube, Manufacture of thermowells: screw-in thermowells DIN 43772 form 5/6/8/9, weld-in thermowells form 4,, Manufacture of valves and accessories (shut-off cocks, shut-off valves, push-button cocks,
- Materials
- Stainless steel, Brass, Galvanized steel, Aluminium
- Certificates
- Acceptance test certificates
- Founded
- 1985
- Industries
- Chemicals, Food, Construction/concrete processing, Floor laying technology, Heating/HVAC, Laboratory
- 01
Engineering and product configuration
- 02
Machining of thermowells and valves
- 03
Manufacturing and assembly of the measuring instruments
- 04
Testing and issuing of acceptance test certificates
- 05
Shipping
Materials & Processes
Stainless steel
Used for housings, thermowells and chemical versions of the thermometers.
Brass
Used for thermowell sockets, sleeves and valves such as shut-off cocks.
Galvanized steel
Galvanized steel for thermowell and accessory components.
Aluminium
Housings and pointers of dial thermometers made of aluminium.
Locations

Lemgo
DEHeadquarters and manufacturing
- Materials
- Stainless steel, brass, steel, aluminium
Products & Components

Industries
Processes & technical limits
| Processes | Tolerance | Max. part | Weight | Lot size | Materials |
|---|---|---|---|---|---|
| Manufacture of bimetal thermometers (dial thermometers, bottom-connected thermometers,Assembly | – | Measuring ranges -40 to +600 °C | – | – | Stainless steel, Brass, Steel |
| Manufacture of gas-actuated thermometers (standard and chemical versions, filled with inert gas)Assembly | – | – | – | – | Stainless steel, Brass |
| Manufacture of glass thermometers (machine, heating, laboratory and chemical glass thermometers toAssembly | – | – | – | – | Brass |
| Manufacture of Pt 100 resistance thermometersAssembly | – | – | – | – | – |
| Manufacture of hygrometers and thermo-hygrometers (dew-point, surface, duct measurement)Assembly | – | – | – | – | – |
| Manufacture of pressure gauges (Bourdon tube, diaphragm, capsule, differential pressure, U-tubeAssembly | – | – | – | – | – |
| Manufacture of thermowells: screw-in thermowells DIN 43772 form 5/6/8/9, weld-in thermowells form 4,Machining | – | – | – | – | Brass, Stainless steel, Steel |
| Manufacture of valves and accessories (shut-off cocks, shut-off valves, push-button cocks,Machining | – | – | – | – | Brass, Stainless steel |
| Issuing of acceptance test certificates for many material gradesTesting | – | – | – | – | – |
Additional services
Quality
BITHERMA issues acceptance test certificates for many material grades. The instruments are manufactured according to DIN standards such as DIN 43772 or DIN 16167/16168/16174/16175.
| Evidence | Lemgo |
|---|---|
| Acceptance test certificates |
History
- 1985
Founded as a manufacturer of bimetal thermometers, gas-actuated thermometers, machine thermometers and other temperature measuring instruments
- 2001
Acquisition of the company Dippel & Götze, expansion of production to include hygrometers