Shop Online
Search MHI
  • MHI Search
Temperature Converter

Enter a number
& click on
the "Calculate" button
°F= °C


High Uniformity G-Robust Radiators (GRR) and Hot-Sleeves for 1250°C/1300°C User Applications


Design Your GRR Robust Radiator Heater With This Calculator

Multi-Zone Capable.  Provided with Non-toxic Ceramic Enclosure

Please contact MHI for dimensions of GRR.  Note that the dimensions below are for heated.  Use with DC or AC (50/60 Hz) current..

GRR Model ID (in) L (in) (add 2" for total length) Power (kW) (Nominal) Control Panel Volts**
GRR1(3)-110 1 3 1 IBPAN-110 115/120
GRR2(2)-120 2 2 1.4 IBPAN-110 110120
GRR2(4)-220 2 4 2.5 IBPAN-220 220/230
GRR2(10)-220 2 10 6 IBPAN-220 220/230
GRR 2(8)-220 2 8 5 IBPAN-220 220/230
GRR 3(6)-220 3 6 6 IBPAN-220 220/230
GRR 4.5(2)-220 4.5 2 3 IBPAN-220 220/230/240
GRR 6.3(2)-220 6.3 2 4.2 IBPAN-220 220/230/240



GRR High Uniformity Robust Radiators may be used to approximately 1300°C.
For temperatures higher than 1300°C for the Robust Radiator, please click on Robust Radiators.

Provide the ID and desired length of your heated zone to calculate the maximum power below for GRR™ Robust Radiator.

 Heated Zone ID:
Heated Zone Length:
GRR Power:

GA-XP CoilGRR Robust Radiator with Stainles SteelInformation request push button

Schematic of Heated Zone ID and L.

Piciture show with stainless steel eneclosure and without and the basic heating zone dimensions.

** Plug-in voltage indicates closest IBPAN preference. The GRR unit-temperature (including the element maximum temperature, GAXP -1400C), rated amperage (current) or power, cannot be exceeded in any configuration of use.   Configuration of use changes with end caps, load, flow, placement of control thermocouple and extent of insulation. 

Sleeve Heaters

High Temperature Sleeve Heaters

High temperature sleeve heaters

High Temperature Sleeve Heaters

High temperature sleeve heaters


Use for individual zone heaters in zone refining operations

Model # Max Power (Watts) Heated Length (A) Overall Length (B) ID (C) OD (D)
SLH1.5 350 0.25 in 2 in 1.5 in 5 in
SLH-3.0 800 0.25 in 2 in 3 in 6.5 in


MHI Contact Us

Unlimited Power witth Multiple Zones

  • High power density
  • Volume pricing
  • Non-toxic fiber-free enclosure
  • Match to your line voltage if required
  • Full line of electronic controls available
  • Rapid Delivery

Live Customer Support by phone (513-772-0404) or email. Typical Single and Multi Zone Configurations. Terminal Connectors Shown for Each Zone End-caps and other accessories available, see section on Robust Radiators.

Multi Zone Stacked GRR modules. 6 Stack Module.


  • Click link above for:
  • Details of Applications
  • Power Calculator above
  • RF/MW applications
  • Non toxic substrates

LinkedIn  Twitter  MHI Google Plus  Facebook  YouTube    MHI Certification

©Micropyretics Heaters International Inc. 1995 - 2018
750 Redna Terrace Cincinnati, OH 45215, USA
Telephone: 513-772-0404 | Fax: 513-672-3333