Laboratory thermostat Universa U 855 M

digitalelectroniccirculating

Product overview
The Universa U 855 M bath circulation cooling thermostat (Universa PRO / Universa MAX platform) is delivered with a bath cover and pump connections as standard. A front-mounted drain valve behind the ventilation grille allows safe and easy exchange of the temperature control fluid.

Features

• Bath circulation thermostat with advanced electronics for precise temperature control (stability 0.01 ± K).
• Dedicated Tmax button for quick access to overtemperature protection during commissioning.
• Accessible front switch on the control head to adjust pump output during operation.
• Adaptive bath edge ventilation (patent application): prevents icing and condensation, stops water ingress into the bath and blocks vapours to protect electronics.
• Comprehensive connectivity: standard Ethernet, USB and external Pt100 interface plus eleven optional interface modules.
• Integrated Wi‑Fi communication (usable in certified countries/regions only).
• Modular design with interchangeable control head and heating/cooling base for future adaptations.
• LAUDA Varioflex pressure‑suction pump with eight selectable performance levels and adjustable internal/external flow distribution; ball‑bearing pump option for highly viscous or contaminated fluids.
• High‑efficiency refrigeration technology: speed‑controlled inverter compressor, electronic expansion valves and speed‑controlled fans for improved energy efficiency and quieter operation.
• Extensive functionality: programmer, safe mode, calibration options, controller self‑adaptation and weekly planner.
• 5-inch colour TFT display with temperature progression graph, six‑language menu and intuitive cursor/soft key operation.
• Integrated web server for remote control (LAUDA Command app / browser) with PKI and two‑factor authentication; connection to LAUDA.LIVE for cloud analysis and remote maintenance.
• Comprehensive safety functions: over/under‑level protection, adjustable overtemperature protection with acoustic alarm, automatic start‑up diagnostics and smart temperature‑control media management.

Working range
Min. working temperature: -55 °C
Max. working temperature: 200 °C
Temperature stability: 0.01 ± K

Cooling capacity (selected values)
Temperature | Pump level | Tempering medium | Cooling capacity 50 Hz | Cooling capacity 60 Hz
200 °C | 8 | Thermal oil | 1.6 kW | 1.6 kW
100 °C | 8 | Thermal oil | 1.6 kW | 1.6 kW
20 °C | 8 | Ethanol | 1.6 kW | 1.6 kW
10 °C | 8 | Ethanol | 1.45 kW | 1.45 kW
0 °C | 8 | Ethanol | 1.25 kW | 1.25 kW
-10 °C | 8 | Ethanol | 0.88 kW | 0.88 kW
-20 °C | 4 | Ethanol | 0.62 kW | 0.62 kW
-30 °C | 4 | Ethanol | 0.38 kW | 0.38 kW
-40 °C | 4 | Ethanol | 0.18 kW | 0.18 kW
-50 °C | 4 | Ethanol | 0.05 kW | 0.05 kW
-55 °C | 4 | Ethanol | 0.02 kW | 0.02 kW

Technical data (according to DIN 12876)
- Working temperature range: -55 ... 200 °C
- Operating temperature range: -55 ... 200 °C
- Ambient temperature range: 5 ... 40 °C
- Temperature stability: 0.01 ± K
- Max. power consumption: 3.8 kW
- Current consumption: 16 A
- Bath opening (WxD): 150 x 150 mm
- Min. / max. bath volume: 5.0 / 8.0 L
- Max. discharge pressure: 0.7 bar
- Pump suction max.: 0.4 bar
- Max. pump flow: 25 L/min
- In / Outlet connection thread (outside): M16 x 1
- In / Outlet Ø olives: 13 mm
- Dimensions (WxDxH): 310 x 490 x 757 mm
- Weight: 45 kg
- Power supply: 200-240 V, 50/60 Hz
- Power plug: Power cord with angled plug (CEE7/7)

Characteristics / technical specifications

• Model: Universa U 855 M
• Working temperature range: -55 to 200 °C
• Temperature stability: 0.01 ± K
• Bath volume: 5.0–8.0 L
• Bath opening: 150 x 150 mm
• Max. pump flow: 25 L/min
• Max. discharge pressure: 0.7 bar
• Power supply: 200–240 V, 50/60 Hz
• Max. power consumption: 3.8 kW
• Dimensions (WxDxH): 310 x 490 x 757 mm
• Weight: 45 kg