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EDL Ultra Bath Stirred Liquid Temperature Calibrator

EDL Ultra Bath stirred liquid temperature calibrators for stable comparison calibration of thermometers and temperature probes.

Models: UB-4010, UB-1020 and UB-2050.
Temperature coverage: -40°C to 550°C across the series.
Bath capacity: 42 litres with an 18" deep tank.
Suitable for: RTDs, PRTs, SPRTs, thermometers and insertion temperature probes.

Description Attachments

EDL Ultra Bath Stirred Liquid Temperature Calibrator

The EDL Ultra Bath series is designed for comparison calibration of temperature sensors in a stable, stirred liquid environment.

Three models cover temperatures from -40°C to 550°C. The large 42-litre bath and 18-inch tank depth allow multiple temperature sensors to be immersed and compared during the same calibration run.

The Ultra Bath can accommodate different probe shapes and diameters, making it suitable for laboratory and calibration work involving RTDs, PRTs, SPRTs, bi-metal thermometers, liquid-in-glass thermometers and other insertion-type temperature sensors.

Model Selection

Select the Ultra Bath model according to the required calibration temperature range and bath medium.

Model	Temperature Range	Bath Medium	Stability & Uniformity
UB-4010	-40°C to 100°C	Silicone oil	-30°C: 5 mK 80°C: 5 mK
UB-1020	50°C to 200°C	Silicone oil	Below 150°C: 5 mK Below 200°C: 5 mK
UB-2050	200°C to 550°C	Salt	250°C: 10 mK 550°C: 30 mK

Key Features

Three models covering -40°C to 550°C
Large 42-litre bath volume
45.72 cm (18") internal tank depth
12.70 × 27.94 cm (5" × 11") access opening
Suitable for simultaneous calibration of multiple temperature sensors
Advanced programmable temperature controller
Pumped liquid stirring system for stable bath conditions
Built-in sensor holding arrangement
Easy-fill and drain tank design
304 stainless steel wetted parts
RS-232 interface
iTools software support
NIST-traceable calibration report included
Integrated wheeled cart for laboratory positioning

Common Specifications

Specification	Details
Tank Dimensions	30.10 × 30.10 cm (11.85" × 11.85")
Inside Tank Depth	45.72 cm (18")
Opening	12.70 × 27.94 cm (5" × 11")
Bath Capacity	42 litres (11 gallons)
Exterior Dimensions	63.83 cm wide × 59.69 cm deep × 134.49 cm high (25.13" × 23.50" × 52.95")
Approx. Weight	249 kg (550 lb), excluding bath fluid and crate
Wetted Parts	304 stainless steel
Display Resolution	0.01°C
Interface	RS-232 and iTools
Published Electrical Supply	240 VAC, 25 A, 60 Hz

Large 42-Litre Calibration Bath

The Ultra Bath provides a large working volume for comparison calibration of several temperature sensors at the same time.

Its 45.72 cm (18") internal depth provides useful immersion length for long probes, while the 12.70 × 27.94 cm opening gives sufficient working space for different sensor diameters and configurations.

A pumped stirring system circulates the bath medium continuously to maintain consistent temperature conditions around the immersed sensors.

Temperature Sensor Calibration

The Ultra Bath can be used with a wide range of insertion temperature instruments, including:

Resistance temperature detectors (RTDs)
Platinum resistance thermometers (PRTs)
Standard platinum resistance thermometers (SPRTs)
Bi-metal thermometers
Liquid-in-glass thermometers
Industrial temperature probes
Temperature sensors with different sheath diameters and shapes

UB-4010

The UB-4010 covers temperatures from -40°C to 100°C and uses silicone oil as the stirred bath medium.

It is the low-temperature model in the Ultra Bath series and is suitable where calibration points extend below ambient temperature.

Temperature Range	-40°C to 100°C
Bath Medium	Silicone oil
Stability & Uniformity at -30°C	5 mK
Stability & Uniformity at 80°C	5 mK

UB-1020

The UB-1020 covers temperatures from 50°C to 200°C using silicone oil.

It provides a mid-temperature stirred bath for comparison calibration of suitable temperature probes and thermometers.

Temperature Range	50°C to 200°C
Bath Medium	Silicone oil
Stability & Uniformity below 150°C	5 mK
Stability & Uniformity below 200°C	5 mK

UB-2050

The UB-2050 is the high-temperature model, covering 200°C to 550°C.

It uses salt as the bath medium and is intended for higher-temperature comparison calibration of compatible sensors.

Temperature Range	200°C to 550°C
Bath Medium	Salt
Stability & Uniformity at 250°C	10 mK
Stability & Uniformity at 550°C	30 mK

Comparison Calibration

A stirred liquid bath provides a common temperature environment for the reference thermometer and the sensors being checked.

The instruments are immersed to the required depth and allowed to stabilise before their readings are compared with the reference measurement.

The large Ultra Bath working volume is particularly useful where several sensors need to be checked at the same temperature point.

Typical Applications

Temperature calibration laboratories
Quality assurance departments
Instrument calibration and maintenance
RTD and PRT comparison calibration
Thermometer verification
Process temperature sensor checks
Multi-probe comparison calibration

Selecting the Correct Ultra Bath

Start with the lowest and highest calibration temperatures required. Choose a model whose operating range covers all intended calibration points.

Also consider the type and quantity of sensors, probe insertion length, sheath diameter and the bath medium required for the operating temperature.

Requirement	Model
Calibration below ambient temperature	UB-4010
General mid-temperature calibration up to 200°C	UB-1020
High-temperature calibration from 200°C to 550°C	UB-2050

Before Ordering

Please provide the following information when requesting a quotation:

Required minimum and maximum calibration temperatures
Temperature sensor or thermometer type
Probe diameter
Probe insertion length
Number of sensors to be calibrated simultaneously
Required calibration documentation
Available electrical supply

The bath model and fluid should be selected for the required calibration temperature range. Electrical supply requirements should also be confirmed before ordering.