Feedback and Temperature Control
Scientific article about temperature controller. Addresses controller types, algorithms, transient responses and simulations.
http://newton.ex.ac.uk/teaching/CDHW/Feedback/

Anly Electronics Co., Ltd.
Manufacturer of timer, counter, controller, floatless relay, relay, solid state relay and digital temperature controller.
http://www.anly.com.tw/

Temperature Logger
Temperature logging and solar heated water controller. Build your own electronic project.
http://www.anotherurl.com/therm/Default.htm

Feedback and Temperature Control
An introduction to the effects of feedback using a PID temperature controller as a case study. An interactive simulation is also provided. From Charles D. H. Williams of the University of Exeter
http://newton.ex.ac.uk/teaching/CDHW/Feedback/index.html

McShane
Temperature controller, NTC thermistor sensor, PID, TEC and process control products. OEM industrial electronics products and services, design and manufacture.
http://mcshaneinc.com/

Power Runner
Manufacturer of a training equipment specialized for runner. USA.
http://www.powerrunner.com

MorHeat Inc.
MorHEAT manufactures MPI melt pressure products and MPI temperature Controls. MPI plastic melt pressure transducers economically replace units from BRAND-D, Gefran, ISI, GP50, and Gentran. Our full range of products include : Melt Pressure Transmitters, Digital Gages, Indicators, Temperature Controls, Controllers and Rupture discs(disks).
http://www.morheat.com/

Paragon
Paragon Auto Control established in 1996, principally engaged in manufacturing of world class range of process control instruments like Electronic Timer, Counters & Temperature controllers Time switch,Water level controller,Proximity sensor and controller. The highest product quality,individual consultation , advice for proper selection / application of instruments and fast delivery are the hallmarks of our company - Process Control Instruments, Electrical Switchgear, DIN Rail Timer, Analog Timer, Digital Timer, Electrical Control Panel Accessories, Temperature Controller, Proximity Switch, Liquid Level Control, Digital Preset Counter, Flame Failure Detector,Real Time Switch, Programmable counter, Electronic Timer, Analog Temperature Controller, Water Level Control.
http://www.paragoncontrol.com

Leierda Instrument Co.
1. Pressure Gauge: bourdon tube(general purpose),weather-proof, liquid filled, low-pressure, diaphragm-seal, with electric/micro contact,test pressure gauge,digital pressure gauge,diaphragm pressure, ss gauge,pressure switch. 2. ... ¡£Specializes in manufacture of tire pressure gauges, precision pressure gauges, equipment & instruments, test equipment for auto and more in over10 categories and several 10 varieties.
http://www.chinaleierda.com

PID controller design and tuning on Internet
PID controller laboratory providing free interactive applets for robust PID tuning, design and loop simulation based on known or unknown process model
http://www.pidlab.com