Controls and Components
Tube Heater Control Guide
Series | Standard Option | Available Control Scenario |
HL3 DX3L LS3 LD3 DSR DST | 24V Control (onboard) | • Single Heater to Single 24 V Thermostat • Multiple Heaters to Single 24 V Thermostat require the use of p/n: ERK and p/n: 4000-01V |
DET3 | 24V Control (external) | • Single or Multiple Heater(s) to Single 24 V Thermostat require the use of p/n: 4000-01V |
DES3 DX2-SB/-SS | 120V Control | • Single or Multiple Heater(s) to Single 120 V Thermostat • Single or Multiple Heater(s) to Single 24 V Thermostat require the use of p/n: R8285B |
24V Controls
 | External Relay Kit for controlling multiple heaters with 24V control. | |
 | 40 VA transformer, 120–24 VAC primary and secondary. Used with ERK to control multiple heaters. | |
 | 24V Wall Control Switch - HL3 and similar 24V Two Stage heaters. | |
 | Two Stage thermostat. 35°–75°F range. Voltage: 24, 120 VAC | |
 | Single stage or two stage programmable thermostat. 45°–90°F range. 24 VAC | |
 | 4 Hour Timer Control Switch - HL3 and similar 24V Two Stage heaters. | |
 | Two Stage thermostat with rain tight enclosure 40°–100°F range. Can be used with 24–277 VAC. |
120V Controls
 | Single stage thermostat. 35°–75°F range. 24-277 VAC | |
 | Single stage thermostat with rain tight enclosure 40°–100°F range. Can be used with 24–277 VAC. | |
 | Combination relay transformer - For controlling 120 V units with 24 V thermostats | |
 | Single stage 120 V line voltage thermostat. (4-period) programmable. 40°–86°F range |