Technical Parameters
Category Parameter Specification / Description
General Model MR98H
Type High-Thrust, Multi-Spring Pneumatic Positioner
Input & Output Input Signal 3 to 15 psi (0.2 to 1.0 bar)
Supply Pressure Up to 150 psig (10.3 bar)
Output Action Double-Acting (Standard)
Performance Output Capacity Extremely High. Specifically designed to supply and exhaust the large air volumes required by piston actuators. Significantly higher than standard positioners like the 3610J.
Linearity ±1% of span
Hysteresis Less than 0.5% of span
Air Consumption Steady State: ~0.2 SCFM (5.7 NLPM)
During Stroking: Very high, capable of flows over 10 SCFM.
Environmental Ambient Temperature -40°F to 180°F (-40°C to 82°C)
Enclosure Rating Type 4X, 7, 9 (NEMA 4X, 7, 9); Weatherproof, dust-tight, and certified for hazardous locations.
Hazardous Area Certifications FM/CSA: Explosion-proof (Class I, Div. 1, Groups B, C, D; Class II, Div. 1, Groups E, F, G).
Physical Housing Material Cast Aluminum with corrosion-resistant coating.
Pneumatic Connections Supply & Outputs: 1/2" NPT (to accommodate high flow)
Mounting Typically mounts directly onto Fisher 98L and other large piston actuators.
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