Kobold Nir-910nn60 | Explosion Proof Atex | Switches | Controlsystemsusa
Process Control Instrumentation, Field Devices and Industrial Automation


Kobold NIR-9 Rotating Vane Level Switch for Bulk Media and solids in silos and hoppers. Aluminum housing. ATEX Approval. IP66.

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  • Industrial Design
  • Aluminum Housing
  • Easy Installation
  • Different Mounting Options
  • Competitive Price
  • ATEX Approval
  • Adjustable Sensitivity

The NIR-9 level switch is suitable for a wide variety of applications for bulk material and solids in silos and hoppers. Product level is reliably controlled, regardless of humidity and conductivity of the product. Different vanes and process connections are available, according to product and tank size. During operation, a motor drives a rotating vane on an extended shaft. As soon as the media reaches the rotating vane, its rotation is impeded. The restoring force moves the pivoted motor away from its original position. A micro-switch is actuated, which gives out an alarm signal. A second microswitch turns off the motor. If the filling level decreases, the rotating vane is released again and the force of a spring pulls the motor back to its original position. The motor restarts and the working contact is switched back. The switching sensitivity can be adjusted to three different settings by changing the spring position.

Technical Details
Measurement PrincipleRotating vane
Media Temperature:-4 ... 194 oF
-4 ... 392 oF (NIR-92)
Ambient Temperature:-4 ... 140 oF
Pressure:-7.25 ... 7.25 PSIG
Max. Grain Size:1.96"
Min. Bulk Density:2.37 lb/ft 3 (depends on vane and sensitivity) see table below
Sensitivity:Adjustable, 3 settings
Rotation Speed:5 r.p.m.
Housing Materials:Polyester coated aluminum 360o rotatable
Connection, Cable, Extension, Tube, Vane Materials:Stainless steel, aluminum
Process Connection (Standard)NIR-910 / E910: 1" NPT male, 303 stainless steel
NIR-920 / E920: 1" NPT male, 303 stainless steel
NIR-962 / E962: 1" NPT male, 303 stainless steel
NIR-95F / E95F: 1" NPT male, 303 stainless steel
NIR-930 / E930: 11⁄2" NPT male, 303 stainless steel
Other Connections: 110 mm and 200 mm flanges
Vane Types:Standard N, foldable vane V, cruciform vane X, aggregate vane A, reinforced vane R
ATEX Approval:Ex II 2/1D Ex t IIIC T85 oC Db/Da
Power Supply:24 V DC or 110 V AC , 50/60 Hz power led
Power Consumption:Max. 2 VA
Electrical Connection:2x 1/2" NPT
Contact:Micro switch (SPDT) max. 250 V AC , 2 A (max 125 VA)
Protection:IP 66

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