The GRAYHILL 61KS256 is a high-resolution optical rotary encoder designed for precise angular position sensing in industrial and automation applications. Manufactured in the USA, this encoder offers reliable performance with a rugged construction and long operational life.
Part Number: 61KS256 Manufacturer: GRAYHILL Country of Origin: US UOM: EA ECCN: EAR99 Package Type: BLK Datasheet
Product Features
High resolution with 256 cycles per revolution (PPR)
Optical sensing technology for precise position feedback
Sealed version available for enhanced environmental resistance
Rugged construction suitable for demanding industrial environments
Available in cable or pin configurations
Operational life of 10 million cycles
Maximum shaft rotation speed of 300 RPM
Compact dimensions: .250 inches (6.35 mm) in diameter
Electrical Specifications
Operating Voltage: 5.0 ± 0.25 Vdc
Supply Current: Max 30 mA at 5 Vdc
Logic Output: Open collector with integrated Schmitt Trigger and 10K ohms pull-up resistor
Maximum Sink Current: 16 mA at 0.40 V
Power Consumption: Max 150 mW
Optical Rise Time: 500 ns (typical)
Optical Fall Time: 16 ns (typical)
Mechanical and Environmental Ratings
Mechanical Life: 10 million revolutions
Guaranteed operational for 10 years
Mounting Torque: Max 20 in-lbs
Shaft Push Out Force: 100 lbs
Terminal Pull-out Force: Min 5 lbs
Operating Temperature Range: -40°C to 85°C
Storage Temperature Range: -55°C to 100°C
Relative Humidity: 90-95% at 40°C for 96 hours
Vibration Resistance: 15g amplitude, 10-2000 Hz for 12 hours
Shock Resistance: 100g for 6 ms (half-sine and sawtooth waves)
Materials and Finishes
Shaft: Stainless steel
Rotor: Nylon
Retaining Ring: Stainless steel
Code Rotor and Aperture: Chemically etched stainless steel/electroformed nickel
Printed Circuit Board: NEMA Grade FR-4 with minimum gold over nickel finish
Dimensions
.250 (6.35)
Additional Information
This encoder features a sealed optical sensing element, rugged construction for industrial use, and a long operational lifespan. For more details, please refer to the datasheet.
Note: Datasheet was not processed, please search the internet for the part number for more details.
I'm particularly impressed with how carefully the header pins are packed for the RP2350-PiZero, they arrived in perfect condition without any bent pins, which has been a persistent issue with other competitors. This attention to packaging detail really stands out.
I also received the latest A4 revision of the RP2350, which shows you maintain current inventory, that's really valuable for customers who want the most up to date components.
The delivery was quick and hassle free throughout. I'll definitely be recommending you to others!
App feedback: The discounts offered through the app are a nice bonus, but the component search function could be improved to match the ease of use on the website version. The rest of the app functions work well.
{"id":10021303157053,"title":"61KS256","handle":"61ks256","description":"\u003ch3\u003eGRAYHILL 61KS256 Rotary Encoder Optical 256PPR\u003c\/h3\u003e\n\u003cp\u003eThe GRAYHILL 61KS256 is a high-resolution optical rotary encoder designed for precise angular position sensing in industrial and automation applications. Manufactured in the USA, this encoder offers reliable performance with a rugged construction and long operational life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 61KS256\u003cbr\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e GRAYHILL\u003cbr\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e US\u003cbr\u003e\n\u003cstrong\u003eUOM:\u003c\/strong\u003e EA\u003cbr\u003e\n\u003cstrong\u003eECCN:\u003c\/strong\u003e EAR99\u003cbr\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e BLK\u003cbr\u003e\n\u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-gh\/gh-61ks256.pdf\" target=\"_blank\"\u003eDatasheet\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh resolution with 256 cycles per revolution (PPR)\u003c\/li\u003e\n\u003cli\u003eOptical sensing technology for precise position feedback\u003c\/li\u003e\n\u003cli\u003eSealed version available for enhanced environmental resistance\u003c\/li\u003e\n\u003cli\u003eRugged construction suitable for demanding industrial environments\u003c\/li\u003e\n\u003cli\u003eAvailable in cable or pin configurations\u003c\/li\u003e\n\u003cli\u003eOperational life of 10 million cycles\u003c\/li\u003e\n\u003cli\u003eMaximum shaft rotation speed of 300 RPM\u003c\/li\u003e\n\u003cli\u003eCompact dimensions: .250 inches (6.35 mm) in diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Voltage: 5.0 ± 0.25 Vdc\u003c\/li\u003e\n\u003cli\u003eSupply Current: Max 30 mA at 5 Vdc\u003c\/li\u003e\n\u003cli\u003eLogic Output: Open collector with integrated Schmitt Trigger and 10K ohms pull-up resistor\u003c\/li\u003e\n\u003cli\u003eMaximum Sink Current: 16 mA at 0.40 V\u003c\/li\u003e\n\u003cli\u003ePower Consumption: Max 150 mW\u003c\/li\u003e\n\u003cli\u003eOptical Rise Time: 500 ns (typical)\u003c\/li\u003e\n\u003cli\u003eOptical Fall Time: 16 ns (typical)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMechanical and Environmental Ratings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMechanical Life: 10 million revolutions\u003c\/li\u003e\n\u003cli\u003eGuaranteed operational for 10 years\u003c\/li\u003e\n\u003cli\u003eMounting Torque: Max 20 in-lbs\u003c\/li\u003e\n\u003cli\u003eShaft Push Out Force: 100 lbs\u003c\/li\u003e\n\u003cli\u003eTerminal Pull-out Force: Min 5 lbs\u003c\/li\u003e\n\u003cli\u003eOperating Temperature Range: -40°C to 85°C\u003c\/li\u003e\n\u003cli\u003eStorage Temperature Range: -55°C to 100°C\u003c\/li\u003e\n\u003cli\u003eRelative Humidity: 90-95% at 40°C for 96 hours\u003c\/li\u003e\n\u003cli\u003eVibration Resistance: 15g amplitude, 10-2000 Hz for 12 hours\u003c\/li\u003e\n\u003cli\u003eShock Resistance: 100g for 6 ms (half-sine and sawtooth waves)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterials and Finishes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShaft: Stainless steel\u003c\/li\u003e\n\u003cli\u003eRotor: Nylon\u003c\/li\u003e\n\u003cli\u003eRetaining Ring: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCode Rotor and Aperture: Chemically etched stainless steel\/electroformed nickel\u003c\/li\u003e\n\u003cli\u003ePrinted Circuit Board: NEMA Grade FR-4 with minimum gold over nickel finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDimensions\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\u003ctd\u003e.250 (6.35)\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cp\u003eThis encoder features a sealed optical sensing element, rugged construction for industrial use, and a long operational lifespan. For more details, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-gh\/gh-61ks256.pdf\" target=\"_blank\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eNote: Datasheet was not processed, please search the internet for the part number for more details.\u003c\/p\u003e","published_at":"2025-08-12T14:47:34+05:30","created_at":"2025-08-12T14:47:35+05:30","vendor":"Waldom Electonics","type":"Encoders","tags":["Encoders","GRAYH","IMPORT_CSV","WLDM"],"price":993005,"price_min":993005,"price_max":993005,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":50612090306877,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"61KS256","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"61KS256","public_title":null,"options":["Default Title"],"price":993005,"weight":250,"compare_at_price":null,"inventory_management":"shopify","barcode":"61KS256","requires_selling_plan":false,"selling_plan_allocations":[]}],"images":["\/\/thinkrobotics.com\/cdn\/shop\/files\/61KS256_Series_2061K_4af20cbd.jpg?v=1754990258"],"featured_image":"\/\/thinkrobotics.com\/cdn\/shop\/files\/61KS256_Series_2061K_4af20cbd.jpg?v=1754990258","options":["Title"],"media":[{"alt":null,"id":45800950038845,"position":1,"preview_image":{"aspect_ratio":1.0,"height":200,"width":200,"src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/61KS256_Series_2061K_4af20cbd.jpg?v=1754990258"},"aspect_ratio":1.0,"height":200,"media_type":"image","src":"\/\/thinkrobotics.com\/cdn\/shop\/files\/61KS256_Series_2061K_4af20cbd.jpg?v=1754990258","width":200}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch3\u003eGRAYHILL 61KS256 Rotary Encoder Optical 256PPR\u003c\/h3\u003e\n\u003cp\u003eThe GRAYHILL 61KS256 is a high-resolution optical rotary encoder designed for precise angular position sensing in industrial and automation applications. Manufactured in the USA, this encoder offers reliable performance with a rugged construction and long operational life.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003ePart Number:\u003c\/strong\u003e 61KS256\u003cbr\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e GRAYHILL\u003cbr\u003e\n\u003cstrong\u003eCountry of Origin:\u003c\/strong\u003e US\u003cbr\u003e\n\u003cstrong\u003eUOM:\u003c\/strong\u003e EA\u003cbr\u003e\n\u003cstrong\u003eECCN:\u003c\/strong\u003e EAR99\u003cbr\u003e\n\u003cstrong\u003ePackage Type:\u003c\/strong\u003e BLK\u003cbr\u003e\n\u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-gh\/gh-61ks256.pdf\" target=\"_blank\"\u003eDatasheet\u003c\/a\u003e\u003c\/p\u003e\n\n\u003ch3\u003eProduct Features\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eHigh resolution with 256 cycles per revolution (PPR)\u003c\/li\u003e\n\u003cli\u003eOptical sensing technology for precise position feedback\u003c\/li\u003e\n\u003cli\u003eSealed version available for enhanced environmental resistance\u003c\/li\u003e\n\u003cli\u003eRugged construction suitable for demanding industrial environments\u003c\/li\u003e\n\u003cli\u003eAvailable in cable or pin configurations\u003c\/li\u003e\n\u003cli\u003eOperational life of 10 million cycles\u003c\/li\u003e\n\u003cli\u003eMaximum shaft rotation speed of 300 RPM\u003c\/li\u003e\n\u003cli\u003eCompact dimensions: .250 inches (6.35 mm) in diameter\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eElectrical Specifications\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eOperating Voltage: 5.0 ± 0.25 Vdc\u003c\/li\u003e\n\u003cli\u003eSupply Current: Max 30 mA at 5 Vdc\u003c\/li\u003e\n\u003cli\u003eLogic Output: Open collector with integrated Schmitt Trigger and 10K ohms pull-up resistor\u003c\/li\u003e\n\u003cli\u003eMaximum Sink Current: 16 mA at 0.40 V\u003c\/li\u003e\n\u003cli\u003ePower Consumption: Max 150 mW\u003c\/li\u003e\n\u003cli\u003eOptical Rise Time: 500 ns (typical)\u003c\/li\u003e\n\u003cli\u003eOptical Fall Time: 16 ns (typical)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMechanical and Environmental Ratings\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eMechanical Life: 10 million revolutions\u003c\/li\u003e\n\u003cli\u003eGuaranteed operational for 10 years\u003c\/li\u003e\n\u003cli\u003eMounting Torque: Max 20 in-lbs\u003c\/li\u003e\n\u003cli\u003eShaft Push Out Force: 100 lbs\u003c\/li\u003e\n\u003cli\u003eTerminal Pull-out Force: Min 5 lbs\u003c\/li\u003e\n\u003cli\u003eOperating Temperature Range: -40°C to 85°C\u003c\/li\u003e\n\u003cli\u003eStorage Temperature Range: -55°C to 100°C\u003c\/li\u003e\n\u003cli\u003eRelative Humidity: 90-95% at 40°C for 96 hours\u003c\/li\u003e\n\u003cli\u003eVibration Resistance: 15g amplitude, 10-2000 Hz for 12 hours\u003c\/li\u003e\n\u003cli\u003eShock Resistance: 100g for 6 ms (half-sine and sawtooth waves)\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eMaterials and Finishes\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003eShaft: Stainless steel\u003c\/li\u003e\n\u003cli\u003eRotor: Nylon\u003c\/li\u003e\n\u003cli\u003eRetaining Ring: Stainless steel\u003c\/li\u003e\n\u003cli\u003eCode Rotor and Aperture: Chemically etched stainless steel\/electroformed nickel\u003c\/li\u003e\n\u003cli\u003ePrinted Circuit Board: NEMA Grade FR-4 with minimum gold over nickel finish\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eDimensions\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctr\u003e\u003ctd\u003e.250 (6.35)\u003c\/td\u003e\u003c\/tr\u003e\n\u003c\/table\u003e\n\n\u003ch3\u003eAdditional Information\u003c\/h3\u003e\n\u003cp\u003eThis encoder features a sealed optical sensing element, rugged construction for industrial use, and a long operational lifespan. For more details, please refer to the \u003ca href=\"https:\/\/www.waldomapac.com\/upload\/parts\/datasheets\/mf-gh\/gh-61ks256.pdf\" target=\"_blank\"\u003edatasheet\u003c\/a\u003e.\u003c\/p\u003e\n\u003cp\u003eNote: Datasheet was not processed, please search the internet for the part number for more details.\u003c\/p\u003e"}
