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Compare Renishaw's vast range of optical linear and optical angle encoder systems. Please use the tables below to compare Renishaw's range of optical linear and optical angle encoder systems. For further information and product options, please visit the encoder product configurator. Optical linear readheadsThis table is available as a printer friendly PDF: Optical linear readheads comparison table | Product name | Outputs (resolution) | Reference mark | Limit switches | Maximum speed | Interpolation | Alarm signal format | IP rating | Scale types | Ride height tolerance | Set-up LED | Operating temperature | Cable | Minimum customer clock | Vacuum compatible | Data sheet |
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RGH22 16.0 x 44.0 x 27.0 mm
45 g | RS422: 5 µm, 1 µm, 0.5 µm, 0.1 µm, 50 nm. Analogue: 1 Vpp, 12 µA | Magnetic actuator | Single or dual limits | 10 m/s | Internal | Differential alarm or 3-state | IP50 | RGS20-S tape scale | 0.8 ±0.1 mm | On readhead | 0 °C to 55 °C | Hi-flex, 12 core up to 5 m | 20 MHz, 10 MHz, 5 MHz (for 0.1 µm and 50 nm) | No | Data sheet: RGH22 series readhead | RGH24 14.8 x 36.0 x 13.5 mm
11 g | RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm, 10 nm. Analogue: 1 Vpp, 12 µA | Magnetic actuator | Single limit | 10 m/s | Internal | 3-state | IP40 | RGS20-S tape scale | 0.8 ±0.1 mm | On readhead | 0 °C to 55 °C | Hi-flex, 8 core up to 5 m | 12 MHz, 8 MHz, 6 MHz, 4 MHz (for 0.2 µm, 0.1 µm and 50 nm) | No | Data sheet: RGH24 series readhead | RGH25 10.5 x 36.0 x 13.5 mm
9 g | RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm, 10 nm. Analogue: 1 Vpp, 12 µA | Magnetic actuator | Single limit | 10 m/s | RGB25 (x4 to x400) RGF (x100 to x2000) | Differential alarm or 3-state | IP40 | RGS20-S tape scale | 0.8 ±0.1 mm | On interface | 0 °C to 55 °C | Hi-flex, 8 core up to 5 m | 20 MHz, 10 MHz, 5 MHz (for 0.1 µm and 50 nm) | Data sheet: RGH25F UHV, RGH20F UHV | Data sheet: RGH25 series digital and analogue readhead (archive) Data sheet: RGH25F high resolution encoder system including RGB interface (archive) | RGH26 16.0 x 44.0 x 27.0 mm
45 g | 5 µm, 1 µm, 0.5 µm Mitsubishi serial outputs | Magnetic actuator | Dual limits | 6 m/s | Internal | N/A | IP50 | RGS20-S tape scale | 0.8 ±0.1 mm | On readhead | 0 °C to 55 °C | Hi-flex, 12 core up to 5 m | N/A | No | Data sheet: RGH26 series serial comms readhead | RGH34 9.5 x 15.0 x 15.0 mm
2 g | RS422: 10 µm, 5 µm, 2 µm, 1 µm, 0.4 µm, 0.2 µm, 0.1 µm. Analogue: 1 Vpp with RGI34 interface | Magnetic actuator | Single limit | 8 m/s | RGI34 interface (x4 to x400) | 3-State | 0 | RGS40-S tape scale, RGS40-G glass scale | 1.5 ±0.15 mm | On RGI34 interface | 0 °C to 55 °C | FPC cable up to 150 mm between head and interface | 12 MHz, 8 MHz, 6 MHz, 4 MHz (for 0.4 µm, 0.2 µm and 0.1 µm) | No | Data sheet: RGH34 series encoder system | RGH40 17.0 x 44.0 x 27.0 mm
30 g | RS422: 10 µm, 5 µm, 2 µm, 1 µm, 0.4 µm, 0.2 µm, 0.1 µm. Analogue: 1 Vpp | Magnetic actuator | Dual limits | 10 m/s | Internal | Differential alarm or 3-state | IP50 | RGS40-G glass scale | 0.8 ±0.15 mm | On readhead | 0 °C to 55 °C | Hi-flex, 12 core up to 5 m | 20 MHz, 10 MHz, 5 MHz (for 0.1 µm and 50 nm) | No | Data sheet: RGH40 series readhead | RGH41 17.0 x 44.0 x 27.0 mm
30 g | RS422: 10 µm, 5 µm, 2 µm, 1 µm, 0.4 µm, 0.2 µm, 0.1 µm. Analogue: 1 Vpp | Magnetic actuator | Dual limits | 15 m/s | Internal | Differential alarm or 3-state | IP50 | RGS40-S tape scale | 0.8 ±0.15 mm | On readhead | 0 °C to 55 °C | Hi-flex, 12 core up to 5 m | N/A | No | Data sheet: RGH41 series readhead | SR 
14.8 x 36.0 x 16.5 mm
15 g | RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm, 10 nm, 5nm. Analogue: 1Vpp | IN-TRAC™ auto-phase optical | Customer positioned optical dual limits | 12.5 m/s | Si interface (x4 to x4000) | | IP64 - 'recoverable readhead' | 20 µm RELM Invar scale, 20 µm RSLM stainless steel scale | 0.8 ±0.08 mm | On readhead and Si interface | 0 °C to 85 °C | UL hi-flex, 12 core up to 10 m | 40 MHz, 20 MHz, 12 MHz, 10 MHz, 8 MHz, 6 MHz, 4 MHz, 1 MHZ on all resolutions | No | Data sheet: SiGNUM™ encoder system |
Optical angle readheadsThis table is available as a printer friendly PDF: Optical angle readheads comparison table | Product name | Outputs (resolution) | Reference mark | Limit switches | Maximum speed | Interpolation | Alarm signal format | IP rating | Scale types | Ride height tolerance | Set-up LED | Temperature | Cable | Minimum customer clock | Vacuum compatible | Data sheet |
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SR  14.8 x 36.0 x 16.5 mm
15 g
| RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm, 10 nm, 5 nm. Analogue: 1Vpp FANUC serial: 20 bit, 23 bit, 26 bit | IN-TRAC™ auto-phase optical | Customer positioned optical dual limits | 4,500 rev/min (Ø52 mm) | Si interface (x4 to x4000) | | IP64 - 'recoverable readhead' | 20 µm RESM ring | 0.8 ±0.08 mm | On readhead and Si interface | 0 °C to 85 °C | UL hi-flex, 12 core up to 10 m | 40 MHz, 20 MHz, 12 MHz, 10 MHz, 8 MHz, 6 MHz, 4 MHz, 1 MHZ on all resolutions | No | Data sheet: SiGNUM™ encoder system | RGH20 
14.8 x 36.0 x 13.5 mm
10.5 x 36.0 x 13.5 mm (RGH20F)
11 g | RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm, 20 nm (RGH20F only), 10 nm (RGH20F only). Analogue: 1Vpp | Bolt-on magnetic actuator | Single limit | 2,938 rev/min (Ø52 mm) | Internal or RGF (x100 to x2000) | 3-state | IP40 | 20 µm RESR ring | 0.8 ±0.08 mm | On readhead and RGF interface | 0 °C to 55 °C | Hi-flex, 8 core up to 5 m | 12 MHz, 8 MHz, 6 MHz, 4 MHz (for 0.1 µm, 0.2 µm and 50 nm) | Data sheet: RGH25F UHV, RGH20F UHV | Data sheet: RGH20 series readhead (archive) | RGH35 
9.5 x 15.0 x 15.0 mm
2 g | RS422: 5 µm, 1 µm, 0.5 µm, 0.2 µm, 0.1 µm, 50 nm
Analogue: 1 Vpp using RGI34 interface | Magnetic actuator | Single limit | 2,000 rev/min(Ø52 mm) | RGI34 interface (x4 to x400) | 3-State | 0 | 20 µm RESR ring | 1.5 ±0.08 mm | On RGI34 interface | 0 °C to 55 °C | FPC cable up to 150 mm between head and interface | N/A | No | TBA | RGH40 
17.0 x 44.0 x 27.0 mm
30 g
| RS422: 10 µm, 5 µm, 2 µm, 1 µm, 0.4 µm, 0.2 µm, 0.1 µm. Analogue: 1 Vpp | Magnetic actuator | Dual limits | 3,687 rev/min(Ø52 mm) | Internal | Differential alarm or 3-state | IP50 | RGS40-G and 40 µm RESR rings | 0.8 ±0.15 mm | On readhead | 0 °C to 55 °C | Hi-flex, 12 core up to 5 m | 20 MHz, 10 MHz, 5 MHz (for 0.1 µm and 50 nm) | No | Data sheet: RGH40 series readhead | RGH34 9.5 x 15.0 x 15.0 mm
2 g | RS422: 10 µm, 5 µm, 2 µm, 1 µm, 0.4 µm, 0.2 µm, 0.1 µm. Analogue: 1 Vpp with RGI34 interface | Magnetic actuator | Single limit | 2,020 rev/min(Ø52 mm) | RGI34 interface (x4 to x400) | 3-State | 0 | 40 µm RESR ring | 1.5 ±0.15 mm | On RGI34 interface | 0 °C to 55 °C | FPC cable up to 150 mm between head and interface | 6 MHz, 4 MHz (for 0.4 µm), 12 MHz, 8 MHz, 4 MHz (for 0.2 µm and 0.1 µm) | No | Data sheet: RGH34 series encoder system |
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