Refrigerated Thermostatic Water Bath LB-20RHB For Precise Sub-Ambient Temperature Control

Refrigerated Thermostatic Water Bath LB-20RHB provides precise temperature control from –20°C to +100°C with ±0.1°C accuracy. It uses a PID-controlled refrigeration and circulation system to ensure uniform thermal stability for laboratory testing, calibration, and industrial research.

What is Labotronics LB-20RHB used for?

Labotronics LB-20RHB is used to maintain stable and precise sub-ambient temperature conditions in laboratory environments.

It is primarily used for:

Viscosity measurement of fluids
Chemical reaction temperature control
Calibration of laboratory instruments
Material and thermal stability testing
Sample conditioning and preservation

It ensures repeatable and accurate test conditions for research and quality control.

How does Labotronics LB-20RHB work?

Refrigerated Thermostatic Water Bath LB-20RHB system works using three integrated control systems:

1. Refrigeration System
A compressor cools the bath fluid down to –20°C, maintaining stable low-temperature operation.

2. PID Temperature Controller
Continuously adjusts heating and cooling output to maintain ±0.1°C accuracy.

3. Circulation System
Ensures uniform fluid movement inside the bath, eliminating temperature variations.

Result: Stable, uniform, and highly accurate thermal environment.

Key Features

Temperature range: –20°C to +100°C
Accuracy: ±0.1°C (PID controlled)
20-liter stainless steel chamber
Uniform circulation system (10 L/min)
400 W cooling capacity
1.8 kW heating power
Low-noise refrigeration system
Over-temperature & low-fluid safety protection

Comparison Table (LB Series Refrigerated Baths)

Feature	LB-14RHB	LB-20RHB
Temperature Range	–20°C to +100°C	–20°C to +100°C
Accuracy	±0.1°C	±0.1°C
Bath Capacity	14 L	20 L
Circulation System	Internal	Internal
Cooling Capacity	350 W	400 W
Heating Power	1.5 kW	1.8 kW
Ideal Applications	Calibration, sample conditioning	Viscosity testing, material analysis, extended studies

Key Insight: Labotronics LB-20RHB offers higher capacity and stronger thermal performance, making it suitable for larger sample volumes and long-duration testing

Industries Using Labotronics LB-20RHB

Pharmaceutical laboratories – stability and formulation testing
Chemical research facilities – reaction analysis
Biotechnology labs – controlled sample preservation
Food & beverage testing – quality control
Material testing labs – thermal behavior analysis

When should you choose Labotronics LB-20RHB?

Choose this model when:

You need larger bath capacity (20L)
High precision (±0.1°C) is required
Long-duration experiments are performed
Uniform temperature distribution is critical
Viscosity or material testing is involved

Alternative Equipment

Refrigerated Circulators → external instrument cooling
Heating Circulators → high-temperature applications
Constant Temperature Baths → fixed temperature studies
Low Temperature Baths → below –20°C applications

Technical Specifications

Parameter	Specification
Temperature Range	–20°C to +100°C
Accuracy	±0.1°C
Bath Capacity	20 Liters
Controller	Digital PID
Circulation Flow	10 L/min
Cooling Capacity	400 W @ 20°C
Heating Power	1.8 kW
Display	LED Digital
Material	Stainless Steel
Power Supply	220V AC, 50Hz
Dimensions	440 × 520 × 860 mm
Weight	~47 kg

Key Applications

Viscosity testing (petroleum & chemical fluids)
Reaction kinetics studies
Calibration of analytical instruments
Material thermal property testing
Sample conditioning under controlled temperature

Frequently Asked Questions

What is Labotronics LB-20RHB used for?
It is used for precise temperature control in laboratory testing such as viscosity, calibration, and chemical analysis.
What is its temperature range?
It operates from –20°C to +100°C.
How accurate is the temperature control?
It maintains ±0.1°C accuracy using a PID control system.
Can it run continuously?
Yes, it is designed for long-duration continuous operation.
What fluids are compatible?
Water, glycol-water mixtures, and alcohol-based fluids.
Is it suitable for viscosity testing?
Yes, it is widely used for kinematic viscosity and fluid analysis.

Compliance Standards

ASTM D445 – Viscosity testing standard
ISO 3104 – Fluid property measurement
ISO/IEC 17025 – Laboratory calibration standards

Quick Summary

Refrigerated Thermostatic Water Bath LB-20RHB delivers precise sub-ambient temperature control from –20°C to +100°C with ±0.1°C accuracy. It uses a PID-controlled refrigeration and circulation system to maintain uniform and stable thermal conditions.

It is ideal for viscosity testing, calibration, material analysis, and chemical research, especially in laboratories requiring higher 20L capacity and long-duration temperature stability.