Hengstler ISD37 Incremental Encoders


Hengstler ISD37 Incremental Encoders intrinsically safe optical ATEX hollow shaft encoder ISD37 for extremely high loads in industrial applications is suitable for shaft diameters up to 1 “(25.4 mm). It works reliably in the temperature range from -40 to +100 ° C.

Using an OptoASIC, the latest technology is The rotary encoder is insensitive to shock and vibration and is ideally suited for use in the chemical, food, oil & gas, paper and steel industries. The HSD37 rotary encoder series also includes intrinsically safe ATEX versions for use in potentially explosive areas.

This robust encoder features a double-sealed housing that allows application where regulatory washdown or caustic chemicals are present. Utilization of an advanced Opto ASIC with innovative packaging techniques enables the encoder to operate in high shock and vibration environments. It is also available in an Intrinsically Safe version, certified to ATEX EEx ia IIB T4, when used with the appropriate IS Barrier.

Hengstler ISD37 Incremental Encoders Features

  • One-or two-channel versions
  • Double-sealed housing
  • ATEX- certification for intrinsically safe devices
  • High-resolution, unbreakable code disc
  • Industrial plugs
  • Ingress protection NEMA 4X,6 / IP66, IP67
  • Robust housing made of diecast alumunium
  • Also available as stainless steel variant


Chemical, Food & Beverage, Oil & Gas, Paper, Steel and any other where a precise encoder is needed to operate in harsh environments.

Hengstler ISD37 Incremental Encoders Specification

Product Family ISD37
Ordering Information Rotary Encoder ISD37
Function / Application Incremental
Technology Optical
Approval CE
Housing Diameter [mm] 95,3 mm
Solid- / Hollow Shaft Hollow 6 … 25 mm
Protection Rating Housing IP67
Operating Temperature [°C] -40 … +80 °C
Housing Option Stainless Steel
Nickel Finish
powder coated alumunium
Increased Environmental Requirements High mechanical robustness
Ex atmosphere
CSA approval
Connection Cable
Connection box
Revolutions [rpm] 5.000 rpm
Number of Pulses 15 … 5000
Interface Differential Line Driver
Open Collector NPN

Download Data Sheet: Incremental Encoders ISD37

Ref: hengstler.de

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