Thomas Scientific TRL-11 Low-Temperature Constant-Temperature Water Bath with Observation Window

The Thomas Scientific TRL-11 is a 22 L low-temperature constant-temperature water bath designed for controlled heating, cooling, and liquid-temperature maintenance in laboratory workflows. It features a digital PID temperature controller, air-cooled refrigeration, an observation window, and movable circulation connections for flexible installation.

Key specifications

• Capacity: 22 L
• Temperature stability: Within ±0.05°C without the circulation pump, measured inside the tank
• Temperature control: Digital indicating controller with PID control
• Timer: Auto-start and auto-stop functions, programmable up to 99 hours 59 minutes
• Heating: 1 kW sheathed heater
• Refrigeration: Air-cooled 130 W refrigeration unit using HFO-1234yf
• Cooling capacity: 209 W, approximately 180 kcal/h
• Circulation: 20 W motor with propeller agitation
• Pump performance: Maximum head 2 m, maximum flow 10 L/min, maximum discharge pressure 0.02 MPa
• External circulation ports: Movable IN/OUT connections with Ø12 mm hose ports and Rp3/8 fittings
• Observation window: 258 × 143 mm
• Power: AC100 V, 14 A, 50/60 Hz
• Materials: SUS-304 stainless steel inner tank and baked-finish painted steel exterior
• Dimensions: 405 × 495 × 700 mm; tank height 460 mm and control unit height 240 mm
• Weight: Approximately 38 kg

Safety and included components

• Safety systems include a leakage circuit breaker and self-diagnostic protection for overtemperature, low temperature, low water level, refrigeration faults, temperature sensor errors, abnormal refrigeration pressure, and incorrect settings.
• Includes one stainless steel shelf set and one stainless steel lid.
• The unit was tested for operation at 37°C and is offered as a used, as-is laboratory water bath.