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414 Annealing Furnace Temperature Calibrator. Temperature range from ambient to 1000°C.
Model 414 is designed to pre-warm and anneal Standard Platinum Resistance Thermometers.
The Annealing Furnace Calibrator, model 414, is designed to heat, anneal and cool SPRT’s (Standard
Platinum Resistance Thermometers) prior to calibration.
The temperature range of the Furnace - from ambient to 1000°C enables all types of SPRT’s to be annealed.

414 Annealing Furnace.

Model  Description 
414  Annealing Furnace Temperature Calibrator.

Maintenance Free Use
Available with programmable controller with communications
Temperature Range: Ambient to 1000°C
Control: 0.1°C Resolution
Communications included as standard
Supply: 110VAC, 3kw, 50/60Hz CTE
(230VAC and 110VAC to 110VAC Isolating Transformers are available)e

One of the duties of a calibration laboratory manager is to ensure that the SPRT’s used in the Laboratory are fully annealed and still within specification.
Just using the thermometers within the laboratory will cause work-hardening to take place within the platinum coil of the SPRT. Therefore regular annealing is required to ensure the SPRT’s are in an ideal condition. In 1990 the new temperature scale ITS-90 specified the use of SPRT’s up to the Silver point (961.78°C).
At these temperatures quartz is very porous and in reducing atmospheres the SPRT’s can quickly become contaminated.
The Model 414 Annealing Furnace offers a safe solution for those who wish to anneal SPRT’s up to 1000°C.
To prevent contamination at high temperatures a constant flux of pre-heated air passes the SPRT’s being annealed. A comprehensive handbook accompanies the Furnace.
This Furnace is installed simply and requires no maintenance.
414 Annealing Furnace
MODEL 414
Temperature Range  Ambient to 1000°C 
Resolution  0.1°C 
Communications  Included as standard 
Supply 110 VAC ±10% (50 / 60Hz)
Dimensions  800mm x 400mm x 620mm (HxWxD) 
Weight  88.2 lbs (40kg) 

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