The Classic range costs of:-

Type 721: Setpoints from -50 to 300 ºC. Fixed or adjustable deadband, one or two setpoints, brass or stainless thermal system, electric or pneumatic switching, large setting scale, 0,5% repeatability, lowest deadbands, custom options.

The range is divided into:
Vapour Pressure with Capillary
Model 721: Fixed deadband, single set-point
Model 722: Narrow adjustable deadband, single set-point
Model 723: Wide adjustable deadband, single setpoint with individually adjustable set and reset points.
Model 781: Fixed deadband, dual independent setpoints.

Vapour Pressure with Rigid Stem
Model 731: Fixed deadband, single set-point
Model 732: Narrow adjustable deadband, single set-point
Model 733: Wide adjustable deadband, single setpoint with individually adjustable set and reset points.
Model 734: Fixed deadband, dual independent setpoints.

Gas-filled with Capillary
Model 771: Fixed deadband, single set-point
Model 772: Narrow adjustable deadband, single set-point
Model 773: Wide adjustable deadband, single setpoint with individually adjustable set and reset points.
Model 774: Fixed deadband, dual independent setpoints.

Type 741: Setpoints from -50 to 500 ºC. Fixed or adjustable deadband, one or two setpoints, brass or stainless thermal system, electric or pneumatic switching, large setting scale, 0,5% repeatability, lowest deadbands, custom options.

The range is divided into:-
Organic Liquid filled with Capillary up to 300ºC
Model 741: Fixed deadband, single set-point
Model 742: Narrow adjustable deadband, single set-point
Model 743: Wide adjustable deadband, single setpoint with individually adjustable set and reset points.
Model 744: Fixed deadband, dual independent setpoints.

Mercury filled with Capillary up to 500ºC
Model 761: Fixed deadband, single set-point
Model 762: Narrow adjustable deadband, single set-point
Model 763: Wide adjustable deadband, single setpoint with individually adjustable set and reset points.
Model 764: Fixed deadband, dual independent setpoints.

Over-temperature:
The vapour filled systems are worst, the liquid filled systems are best.