ES-WPT Models: Regulated Ammonia Heaters (With Thermostat)

Please call us at 1-724-872-5007 to check current stock, purchase, or to get a quote!

Therm Coil ES-WPT Models 

2" NPT Steel Screw Plug With Steel Sheath Elements:

If in doubt about which materials are required for your application, please contact us at 1-724-872-5007 or

  • Steel Sheath with 2" NPT Steel Screw Plug (Nickel Brazed or Welded): Our ES-WPT models with 26-49 watt density (W/IN.²) are suitable for heating ammonia (NH3).

 Regulated (With Thermostat):

  • 60°-250°F Thermostat Control: This is the default thermostat temperature range if you choose a regulated heater.
  • Alternate Temperature Ranges Are Available (Contact Us!):

            ●  30°-110°F
            ●  200°-550°F

NOTE - Regulated Models Require A Magnetic Contactor (sold separately) Unless They Are Rated:

  • ≤240V And Single-Phase With An Amperage Rating Of 25 Amps Or Less.

Explosion-Resistant Enclosure (Also Moisture-Resistant and Dust-Proof)

Technical Specifications

  • Element Sheath Material: Steel
  • Quantity Of Elements: 3
  • Electrical Phasing: 3 (Three-Phase)
  • Immersion Length: (C Dim.) ±1/4"
  • Approximate Overall Length: 6-1/2" + (C Dim.) REF.
  • Watt Density: 26 - 49 W/IN.²
  • Terminal Connections: Lead Wires
  • Screw Plug Size: 2" NPT
  • Screw Plug Material: Steel
  • Enclosure Type: Explosion-Resistant Enclosure (Also Moisture-Resistant & Dust-proof)
  • Thermowell Immersed Length: 10-1/8" (B Dim.)
  • Thermowell Accommodates Sensing Bulb Size: .375" DIA.
  • Temperature Control Type: Adjustable SPST Thermostat
  • Temperature Control Range: 60°-250°F

240VAC Units may be operated at 208VAC with reduced wattage:

Model ES-5043-25WPT: If used at 208 VAC, heater operates at 3,754 W (3.75KW) with a watt density of 18.5 W/IN.².

Model ES-10043-41WPT: If used at 208 VAC, heater operates at 7,510 W (7.51 KW) with a watt density of 24 W/IN.².

Model ES-15053-41WPT: If used at 208 VAC, heater operates at 11,267 W (11.27 KW) with a watt density of 36.4 W/IN.².