H. Kuhnke Ltd, Romsey, UK
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High Temperature Encoders

Hengstler Encoders are designed to meet the normal temperature limits of the typical applications for each model. Typically Hengstler Incremental encoders will operate within a range of -10 - +70°C, and standard Hengstler Absolute encoders within -40 - +85°C. This is a guideline and we advise that each individual product be checked for minimum and maximum operating temperatures by referring to the product data sheets.

Hengstler manufacture a selected range of encoders that are suitable for maximum operating temperatures of 100°C (typically minimum -40°C). These include the special purpose Hengstler AR62 / AR63 series submersible absolute encoders, the Hengstler AC58 BiSS/SSi industrial absolute encoders, and the Hengstler RI58T, TD & TG and RI76TD incremental encoders. In the latter case the "T" in the part number identifies the high temperature version of a standard product.

The HD, HSD and DWD range is co-branded Hengstler and NorthStar. These are special purpose heavy duty encoders that also available with ATEX and NEMA certification. If the ATEX versions are required then the maximum operating temperate is reduced to 80°C.

Do You Need a Special Version High Temperature Encoder?

Your requirements may be special in ways other than high temperature, e.g. protection class, corrosion resistance, bearing life, shock and vibration. Please contact The Encoder Company for special engineering advice.

Body Size *	Shaft	Resolution ppr	ATEX Options	Stainless Options	100°C	Series
47.5mm	Solid 10mm	1-3600	✔	✔	✔	HD20
58mm	Solid 10 / 12mm	12 Bit ST	-	✔	✔	AR62/63
58m	Solid 6 / 10mm	12 Bit MT + 17 Bit ST	-	-	✔	AC58
58mm	Hollow 10 / 12mm	12 Bit MT + 17 Bit ST	-	-	✔	AC58
58mm	Solid 6,7,10 / 12mm	4-2500	-	-	✔	RI58-T
58mm	Hollow 10 / 12mm	4-2500	-	-	✔	RI58-TD
58mm	Hollow 14 / 15mm	50-2500	-	-	✔	RI58-TG
67.3mm	Solid 10mm	1-5000	✔	✔	✔	HD25
76mm	Hollow 15-42mm	5-10000	-	-	✔	RI76-TD
90.2mm	Hollow 10/12.7mm	1-3600	✔	✔	✔	HSD25
90.2mm	Hollow 1¼"	1-2500	-	-	✔	HSD35
95.2mm	Hollow 1"	15-5000	✔	✔	✔	HSD37
96.5mm	Options	15-5000	-	-	✔	HSD38
3.75"	Solid 1" thread	15-5000	✔	✔	✔	DWD38

* Body size : Just a guide, please see data sheets.

Other Hengstler ATEX incremental encoders are available and a full list is shown in the ATEX pages of this site.

Hengstler heavy duty incremental encoders shown on this page are branded NorthStar in certain parts of the world.

Hengstler AR62/63 Series Absolute Encoders Single Turn
Solid Shaft, 10mm/12mm
Housing dia 58mm
12 Bit Single Turn Resolution
10-30VDC
Max Speed 5,000 rpm
-40°C to +100°C
Aluminium or Stainless Steel Versions
IP67 or IP69K (Submersible)
SSI, BiSS, or CANopen 389Kb PDF

Hengstler AC58 BiSS/SSI/Parallel Absolute Encoders.
58mm dia body
6 or 10mm solid shaft / 10 or 12mm hollow shaft
Up to 12 Bit MT + 17 Bit ST
5VDC or 10-30VDC
Max Speed 10,000 rpm (continuous)
Max Speed 12,000 rpm (short term)
Aluminium Housing
-40°C - +100°C
Up to IP67
340Kb PDF

Hengstler RI58-T Series Solid Shaft Incremental Encoder
58mm dia body, 6,7,10,12 mm shaft
4-2,500 ppr (specify on order)
5VDC or 10-30VDC
Max Speed 10,000 rpm
Aluminium Housing
-25°C - +100°C
IP64 / IP67
692Kb PDF

Hengstler RI58-TD Through Hollow Shaft Incremental Encoders
58mm dia body, 10 & 12mm shaft
4-2,500 ppr (specify on order)
5VDC or 10-30VDC
Max Speed 4,000 rpm
Aluminium Housing
-25°C - +100°C
IP64
692Kb PDF

Hengstler RI58-TG Through Hollow Shaft Incremental Encoders
58mm dia body, 14 & 15mm shaft
50-2,500 ppr (specify on order)
5VDC or 10-30VDC
Max Speed 4,000 rpm
Aluminium Housing
-10°C - +100°C
IP64
197Kb PDF

Hengstler RI76-TD Series Hollow Shaft Incremental Encoders
76mm dia body, 15-42mm shaft
50-10,000 ppr (specify on order)
5VDC or 10-30VDC
Max Speed @100°C - 1,800 rpm.
Max Speed @70°C and IP40 - 6,000 rpm
Aluminium Housing -25°C - +100°C
Up to IP64
872Kb PDF

Hengstler HD20 Series Solid Shaft Incremental Encoders
Approx 47.5mm x 52.3mm 10mm shaft
1-3,600 ppr (specify on order)
5-26VDC or ATEX 5VDC or ATEX 7-26VDC
Max Speed 6,000 rpm.
Nickel or Stainless Steel versions.
-40°C to +100°C (+80°C ATEX)
IP66/67, NEMA 4X, NEMA 6P, ATEX II
164Kb PDF

Hengstler HD25 Series Solid Shaft Incremental Encoders
Housing 67.3mm x 67.3mm 10mm shaft
1-5,000 ppr (specify on order)
5-26VDC or ATEX 5VDC or ATEX 7-26VDC
Max Speed 6,000 rpm.
Nickel or Stainless Steel versions.
-40°C to +100°C (+80°C ATEX)
IP66/67, NEMA 4X, NEMA 6P, ATEX II
160Kb PDF

Hengstler HSD25 Series Solid Shaft Incremental Encoders
Housing 90.2mm x 90.2mm 10mm/12.7mm shaft
1-3,600 ppr (specify on order)
5-26VDC or ATEX 5VDC or ATEX 7-26VDC
Max Speed 3,600 rpm (peak 6,000).
Nickel or Stainless Steel versions.
-40°C to +100°C (+80°C ATEX)
IP66/67, NEMA 4X, NEMA 6P, ATEX II
180Kb PDF

Hengstler HSD35 Through Hollow Shaft Incremental Encoders. 1¼" Max Shaft Dia
Housing 90.2mm x 90.2mm approx.
1-2,500 ppr (specify on order)
4.5 - 26VDC
Max Speed 3,600 rpm
-40°C to +70°C (or 0°C to +100°C)
IP65 or NEMA 4 (Not ATEX, Not Stainless)
156Kb PDF

Hengstler HSD37 Series Hollow Shaft Incremental Encoders (up to 1")
Housing dia 92.5mm
15-5,000 ppr (specify on order)
5-26VDC
Max Speed 3,600 rpm (peak 6,000)
+40°C to +100°C (+80°C ATEX)
IP66/67, NEMA 6, ATEX II
Anodized Aluminium or Stainless
176Kb PDF

Hengstler HSD38 Series Hollow Shaft Incremental Encoders
Housing dia 96.52mm
15-5,000ppr (specify on order)
5-26VDC
-40°C to +100°C
Anodized Aluminium Housing IP66/67 NEMA 6 (Not ATEX, Not Stainless).
229Kb PDF

Hengstler DWD38 Series Solid Shaft (threaded) Incremental Encoders
Housing dia 3.75 inches
15-5,000 ppr (specify on order)
5-26VDC
Max Speed 3,600 rpm (peak 6,000)
-40°C to +100°C (+80°C ATEX)
Nickel or Stainless Steel Versions
IP66/67, NEMA 7, ATEX II
160Kb PDF