KEYENCE Electrostatic Sensors SK Series
A new solution for anti-static applications
Overview
The KEYENCE SK Series offers advanced solutions for controlling static electricity in the workplace. This series features simultaneous measurement of static electricity and humidity, providing enhanced anti-static control and enabling users to identify potential static-related problems more accurately.
The series includes two main types:
- Hand-held type SK-H050: Ideal for on-the-spot measurements.
- In-line type SK-050/1000: Designed for continuous measurement.
The Most Advanced Static Control: Pin-point Measurement of Both Static Charge and Humidity
Effective static electricity control in the workplace requires sufficient ambient humidity to reduce static charges. However, humidity levels often vary within the same room, making it difficult to measure humidity at specific points near target workpieces. KEYENCE's SK Series provides pin-point measurement of both humidity and static charge for improved anti-static management.
Relationship Between Static Electricity and Humidity
Static electricity and humidity are correlated: when humidity exceeds 60% RH, static charge accumulation is less likely. Even in dry conditions, such as during winter, maintaining adequate humidity around workpieces can prevent static-related issues.
Graph Description: A typical example illustrating the relationship between humidity and static charge shows static voltage decreasing as humidity increases. The graph indicates that static charges are easily accumulated at lower humidity levels and not easily accumulated at higher humidity levels (above 60% RH).
Humidity Variation by Location
Humidity levels can differ within the same room due to temperature variations. Manufacturing environments often have higher temperatures near machinery, leading to lower relative humidity in those specific areas.
Image Description: An example shows a humidity difference between an area close to a wall (60% RH) and the space around a machine (40% RH), highlighting the need for localized humidity measurement.
Industry's First Simultaneous Measurement: By measuring static charge and humidity concurrently, users can precisely identify areas prone to static-related problems. This facilitates the implementation of optimal anti-static measures, such as humidification or the installation of ionizers.
High-Precision and Wide-Range Measurements
Equipped with a high-precision surface potential sensor, the SK Series offers superior measuring accuracy. KEYENCE products can measure highly charged objects up to ±50 kV with a one-volt display resolution.
SK-H050 Hand-held Type
Ideal for On-the-Spot Measurements
- 180 Degree Rotating Head: Features a floating sensor head structure that rotates 180 degrees, allowing for easy measurement in narrow spaces and offering improved shock resistance.
- Easy Handling and Operation: Ergonomic body design ensures comfortable handling.
- Charge Monitor Function: Measures static elimination speed and ion balance to assess ionizer capability. (Requires SK-H055 ionizer monitoring unit, sold separately).
- Data Storage Function: Stores up to 100 measurement data sets internally, transferable to a computer via USB cable as CSV data. PC software is available for free download.
- Laser Pointer for Reference Distance: Dual laser pointers help identify the optimal measuring distance for precise measurements.
- Large, Easy-to-Read LCD: A highly visible liquid crystal display provides clear on-site reading of measurement results.
Diagram Description (Charge Monitor): A graph shows static voltage decay over time, illustrating the performance of an ionizer. The X-axis represents time in seconds (0-3s), and the Y-axis represents voltage in kV (from +36V down to 0.1kV).
Diagram Description (Data Storage): A visual representation shows the SK-H050 connected to a computer via a USB cable for data transfer.
SK-050/1000 In-line Type
Ideal for Continuous Measurement
- Compact Sensor Head: Ultra-small design allows installation in tight spaces within machinery.
- Clearly Visible Indicator: Large LED clearly indicates status, even when the amplifier is not directly visible.
- Connectable Main Unit and Expansion Units: Up to eight amplifiers can be connected, reducing wiring for multi-point measurement applications.
- Installation Distance Correction: Measurement accuracy is maintained by entering the installation distance into the amplifier, correcting for variations between the sensor head and the target workpiece.
- Multiple Output Options: Includes independent 3-output judgment system and analog voltage/current output. A communication unit enables simultaneous data transmission from up to 8 connected units. Supports various communication protocols including PROFINET, PROFIBUS, EtherNet/IPTM, DeviceNetTM, CC-Link, RS-232C, and BCD output.
Lineup and Options
Hand-held Type Options
- Main unit: SK-H050
- Ionizer monitoring unit: SK-H055
- Storage case: OP-87931
- Carrying case: OP-87928
- Wrist strap: OP-87929
- Neck strap: OP-87930
- Ground wire for hand-held type: OP-87926
- Ground wire for ion monitoring unit: OP-87927
In-line Type Options
- Sensor head: SK-050
- Amplifier unit (main): SK-1000
- Amplifier unit (expansion): SK-1050
- Ion balance monitoring unit: OP-87934
- Sensor head connection cables: Available in 2m, 5m, 10m, 20m lengths (OP-87056 to OP-87059).
- L-shaped sensor head connection cables: Available in 2m, 5m, 10m, 20m lengths (OP-87660 to OP-87663).
Dimensions
Detailed dimensional drawings are provided for the SK-H050 (Hand-held type), SK-050 (In-line sensor head), and SK-1000/1050 (In-line amplifier unit), with measurements in millimeters and inches. These diagrams illustrate the physical size and mounting considerations for each component.
Specifications
Hand-held Type (SK-H050)
| Category | Specification | Details |
|---|---|---|
| Charge potential measurement | Measurement mode | High-precision mode / Wide-range mode |
| Measuring distance | 25 mm (0.98") / 100 mm (3.94") | |
| Measuring range | ±2 kV / ±50 kV | |
| Measuring accuracy *1 | ±10 V / ±100 V *2 | |
| Display resolution | 0 to 999 V: 1 V, 1.00 to 9.99 kV: 0.01 kV, 10.0 kV and higher: 0.1 kV | |
| Temperature measurement | Measuring range | 0 to 40°C (32°F to 104°F) |
| Measuring accuracy *3 | ±1°C (±1.8°F) | |
| Display resolution | 0.1°C (0.18°F) | |
| Sampling cycle | 1 s | |
| Humidity measurement | Measuring range | 10 to 85% RH |
| Measuring accuracy *3 | ±5% RH | |
| Display resolution | 1% RH | |
| Sampling cycle | 1 s | |
| Ion balance measuring range | ±1 kV | |
| Charge monitor function *4 | Measuring accuracy *5 | ±10 V |
| Measured voltage display resolution | 1 V | |
| Static elimination time measuring mode | 0 to 99 s | |
| Static elimination time display resolution | 0.1 s | |
| Laser class | Class 1 Laser Product (IEC60825-1, FDA (CDRH) Part 1040.10 *6) | |
| PC interface | USB 2.0 Full Speed | |
| Power supply | Power supply | 2 AA alkaline dry-cell batteries |
| Operating time | 8 hours (in charge potential measuring mode) | |
| Measuring time | Approx. 1.4 ms | |
| Environmental resistance | Operating ambient temperature | 0 to 40°C (32°F to 104°F) (no freezing or condensation) |
| Operating relative humidity *7 | 10 to 85% RH (no condensation) | |
| Material | SK-H050: PC-ABS, PC, SUS / SK-H055: PC, SUS, PTFE, PVC | |
| Weight | SK-H050: Approx. 240 g, SK-H055: Approx. 220 g | |
In-line Type Sensor Head (SK-050)
| Category | Specification | Details |
|---|---|---|
| Charge potential measurement | Measurement mode | High-precision mode / Wide-range mode |
| Reference distance | 25 mm (0.98") / 100 mm (3.94") | |
| Measuring distance | 5 to 50 mm (0.20" to 1.97") / 60 to 120 mm (2.36" to 4.72") | |
| Measuring range *1 | ±2 kV / ±50 kV | |
| Measuring accuracy *2 | ±10 V / ±100 V *3 | |
| Temperature measurement | Sampling cycle | Approx. 1.4 ms |
| Measuring range | 0 to 50°C (32°F to 122°F) | |
| Measuring accuracy *4 | ±1°C (±1.8°F) | |
| Display resolution | 0.1°C (0.18°F) | |
| Humidity measurement | Sampling cycle | 1 s |
| Measuring range | 10 to 85% RH | |
| Measuring accuracy *4 | ±5% RH | |
| Display resolution | 0.1% RH | |
| Sampling cycle | 1 s | |
| Ion balance measuring mode *5 | Ion balance measuring range | ±1 kV |
| Measuring accuracy *6 | ±10 V | |
| Display resolution | 1 V | |
| Environmental resistance | Operating ambient temperature | 0 to 50°C (32°F to 122°F) (no freezing or condensation) |
| Operating relative humidity | 10 to 85% RH (no condensation) | |
| Material | Body case: PC, Metal parts: SUS, Cable: PVC | |
| Weight | Approx. 35 g | |
In-line Type Amplifier Unit (SK-1000, SK-1050)
| Category | Specification | SK-1000 (Main unit) | SK-1050 (Expansion Unit) |
|---|---|---|---|
| Type | Mounting | DIN rail mounting | N/A |
| Main unit/expansion unit | Main unit | Expansion Unit | |
| Display | Display resolution | 0.001 kV | N/A |
| Display range | ±99.999 kV to 99 kV (4-level selection available) | N/A | |
| Analog output *1 | Analog voltage output | ±5 V, 1 to 5 V, 0 to 5 V, output impedance 100 Ω | N/A |
| Analog current output | 4 to 20 mA, maximum load resistance 350 Ω | N/A | |
| Control input *2 | Zero-shift input | Non-voltage input | N/A |
| Timing input | Non-voltage input | N/A | |
| Reset input | Non-voltage input | N/A | |
| Bank input | Non-voltage input | N/A | |
| Control input (General) | Voltage input rating: max 30 V | N/A | |
| Control output *3 | Judgment output | Open collector output (NPN/PNP switching, N.O./N.C. switching) | N/A |
| Alarm output | Open collector output (NPN/PNP switching, N.C.) | N/A | |
| Power supply | Power supply voltage *4 | 10 to 30 VDC, including 10% ripple (P-P) | Supplied from main unit |
| Power consumption (excluding load current of each output) *5 | 1650 mW or below (55 mA or below with 30 V) | 1170 mW or below (39 mA or below with 30 V) | |
| Environmental resistance | Operating ambient temperature | 0 to 50°C (32°F to 122°F) (no freezing or condensation) | 0 to 50°C (32°F to 122°F) (no freezing or condensation) |
| Operating relative humidity | 10 to 85% RH (no condensation) | 10 to 85% RH (no condensation) | |
| Material | Body case and front cover: PC, Key top: POM, Cable: PVC | ||
| Weight (including accessories) | Approx. 150 g / Approx. 140 g | ||
KEYENCE Static Eliminators Lineup
In addition to electrostatic sensors, KEYENCE offers a range of static eliminators:
BAR TYPE: Ultra High-Speed Sensing Ionizer SJ-HA Series
Features a bar type with built-in controller, available in lengths from 360 mm to 3000 mm (14.17"-118.11"). Uses Pulse AC method with an ion balance of ±30 V. Offers excellent static elimination and low maintenance.
BLOWER TYPE: Wide Area Sensing Ionizer SJ-F2000/F5000 Series
A blower type ionizer using Pulse AC method with an ion balance of ±5 V. It is a high-speed, high-precision blower suitable for tabletop or equipment use.
SPOT TYPE: Ultra-Small Integrated Sensing Ionizer SJ-M Series
A spot type ionizer using Pulse AC method with an ion balance of ±15 V. It offers flexible mounting and attachment options.
Contact Information
For inquiries and local office information, please contact KEYENCE.
KEYENCE CORPORATION OF AMERICA
Corporate Office: 669 River Drive, Suite 403, Elmwood Park, NJ 07407
Sales & Marketing Head Office: 1100 North Arlington Heights Road, Suite 210, Itasca, IL 60143
Phone: 1-888-KEYENCE (888-539-3623)
Fax: 855-539-0123
E-mail: keyence@keyence.com
Website: www.keyence.com
KEYENCE CANADA INC.
Head Office: Phone: 905-366-7655, Fax: 905-366-1122, E-mail: keyencecanada@keyence.com
Montreal: Phone: 514-694-4740, Fax: 514-694-3206
Windsor: Phone: 905-366-7655, Fax: 905-366-1122
KEYENCE MEXICO S.A. DE C.V.
Phone: +52-81-8220-7900, Fax: +52-81-8220-9097, E-mail: keyencemexico@keyence.com
Safety Information: Please read the instruction manual carefully in order to safely operate any KEYENCE product.
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