Laboratory oil bath COB series

Product overview
COB Series high-temperature heating circulating oil bath provides a controlled, uniform and stable heat source for laboratory and industrial processes including petroleum, chemical, electronics, physical/chemical research, biological engineering, medical and food testing, quality control, R&D and production. Suitable as a primary or auxiliary heat source for constant-temperature testing and process heating.

Features

• Inner tank made from 304 stainless steel; outer casing with electrostatic powder coating for durability.
• Immersed electric heating tubes ensure fast heating, high thermal efficiency and lower power consumption.
• Digital PID temperature controller with PT100 sensor for accurate control and minimal overshoot.
• Built-in high-temperature stainless steel magnetic circulation pump for leak-free, stable circulation.
• Circulation circuit constructed from stainless steel and copper for corrosion resistance.
• Solid state relay (SSR) control: contactless switching, no open flame, extended service life.
• Explosion-proof version available on request.

Product structure
The inner tank is integrally formed from 304 stainless steel with thermal insulation between inner tank and outer shell to maximise heat retention. Built-in circulation pump is designed to prevent oil leakage. Temperature sensing via PT100 with digital LCD display. Large-capacity inner tanks with compact footprint.

Main Configuration

• Inner pot: 304 stainless steel; outer shell: cold-sprayed finish.
• Heating element: upper and lower coil arrangement for uniform heating and reduced temperature gradients.
• Built-in circulating pump with internal pump head to prevent oil leakage.
• Independent ON/OFF switches for heating and circulation.
• Digital temperature display; PT100 sensor with stainless steel probe.
• Top-side liquid inlet for level observation.
• Safety fuse protection.
• Supplied with silicone tubing; connector types vary by model.
• Dual-use for water and oil; for operation above 99°C use high-temperature methyl silicone oil (lower viscosity improves circulation).

Specifications of Heating Circulating Oil Bath

• Models: COB-5 / COB-20 / COB-50 / COB-100
• Voltage/frequency: 220V/50Hz (COB-5/20/50), 380V/50Hz (COB-100)
• Total power: 2060W / 3180W / 5100W / 8250W
• Oil pump motor power: 60W / 180W / 200W / 250W
• Heating power: 2000W / 3000W / 5000W / 8000W
• Flow: 8 L/min (COB-5/20/50) / 12 L/min (COB-100)
• Lift: 4 m (COB-5/20/50) / 7 m (COB-100)
• Temperature range: RT to +250°C; accuracy ±1°C
• Circulation nozzle and tubing: Φ12mm connector with 8×12mm silicone tube (3 m) for COB-5; inner-wire fittings for larger models.
• Bath capacity / dimensions / oil amount / filling port by model: ~12L (Φ250×250H) / ~27L (385×270×260) / ~47L (425×410×270) / ~65L (480×410×330); oil volume ≈9L / 17L / 30L / 45L.
• Net weight, package dimensions and weights vary by model as specified.

Typical application
Used as heating and circulation oil bath for glass reactors and laboratory reaction systems that require uniform high-temperature heating and stable circulation.

Technical specifications

• Series: COB Series
• Temperature range: RT to +250°C (model dependent)
• Temperature control: Digital PID controller with PT100 sensor
• Inner material: 304 stainless steel
• Heating method: Immersed electric heating tubes (upper/lower coil)
• Circulation pump: Built-in stainless steel high-temperature magnetic pump (leak-free)
• Control electronics: Solid state relay (SSR) based
• Available capacities: approx. 12 / 27 / 47 / 65 L (COB-5/20/50/100)
• Power range: ~2.06 kW to ~8.25 kW depending on model
• Typical flow: 8–12 L/min depending on model