Jon Klima, Owner
360 Trout Lane, PO Box 23, Guffey, CO 80820
Phone: 719 479-2281, Email: jon.klima@gmail.com
In business for 39 years

Controller - Sensor Matches

Summary of sensors used with some of the more common controllers in the Colorado area.

Continental/Webb Systemizer III; a special NTC sensor that is about 21.5 K Ω at 77 ° F. Click here for how to use 30 K Ω thermistors with this controller.

Dan-Mar; 10 K Ω thermistor.

Dencor; 5 K Ω thermistor.

Dynatech; 3 K Ω or 10 K Ω thermistor, depending upon the model.

Hawthone/HI Square; 10 K Ω thermistor.

Heliotrope; the following models use 10 K Ω thermistors: DTT-84 & -94 series, DTT-74 (new) & -794 series, Temp Trac II 80000 & 90000 series are either 10 K Ω or programmable to 3 K Ω or 10 K Ω , Helio-Matic HM-4000A & B and 5000A & B, SP series (the Heliotrope literature says 10 K Ω , but we have worked on some SP Units that use 3 K Ω sensors), Quadra-Temp is programmable to either 3 K Ω or 10 K Ω , Two-Temp. DTT-80Z-ST & DTT-90Z-ST use 30 K Ω thermistors. As far as we can determine, all others use 3 K Ω thermistors including the older DTT-74 and Helio-Matic 4000 & 5000 (no letter following the numbers) models.

Honeywell; PTC sensor, 3340 Ω at 50° F, 3500 Ω at 85° F, and 3700 Ω at 125° F.

Independent Energy; 10 K Ω thermistor.

Johnson/Penn; PTC sensor, 1000 Ω at 70 ° F, 1090 Ω at 100 ° F, and 1210 Ω at 140 ° F.

NDI Apollo 44 series use 30 K Ω thermistors and the 88 series use 10 K Ω thermistors.

Novan; 2011, older units use 3 K Ω thermistors and the newer units use 10 K Ω thermistors, DLP-20 uses 10 K Ω thermistors.

Rho Sigma/Watsco; 10 K Ω thermistor.

Richdel; 10 K Ω thermistor.

Robert Shaw; SD-30, -31, & ST3990 series, 30 K Ω thermistors

SDI; 10 K Ω thermistors.

Solaron; HC0115 & HC0116 use 30 K Ω thermistors, some later Solaron controllers use Honeywell differential controllers and associated sensors.

Solar Controls Corp.; models 77-171, 79-171, 80-171, 77-176, 77-620 use 30K Ω thermistors