Model KFD0 Galvanic Barrier

Model KFD0 Galvanic Barrier

Series MTL7706/7787 Zener Barrier

Intrinsically Safe Barriers for Hazardous Locations

The MTL7706/7787 is an intrinsically safe (IS) shunt-diode barrier that can be used to communicate with and provide isolations for certain Dwyer® transmitters approved for use in hazardous areas. These barriers limit the amount of energy allowed to pass into the hazardous area, which inhibit ignition in flammable atmospheres.

Product Applications

  • Electrically isolates pressure and level transmitters from unregulated circuits for intrinsically safe applications
Starting at $383.90
Grouped product items
Model Description Availability* Qty Price
MTL7706 Intrinsically safe zener barrier 1-3 days*
MTL7787 Intrinsically safe zener barrier. 1-3 days*


Transmitter Voltage:
16.2 V @ 20 mA with 250Ω load (negative w.r.t. earth); 11.0 V @ 20 mA with 500Ω load (negative w.r.t. earth).
Safe Area Output:
4 to 20 mA.
Load Resistance:
0 to 500Ω.
Power Requirement:
20 to 35 VDC w.r.t. earth.
±2 µA under all conditions.
LED Indicator:
Green: Power Indication.
Temperature Limits:
Operating: -4 to 140°F (-20 to 60°C); Storage: -40 to 176°F (-40 to 80°C).
5 to 95% RH.
Accommodate up to 2.5 mm² stranded or single-core.
Safety Description:
28 µV, 300Ω, 93 mA.
4.9 oz (140 g).
Agency Approvals:
See table on Catalog page.


  • Approved for use in hazardous areas

Product Literature


Catalog Pages

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Model Description Availability* Price