Specs High-Accuracy Inline Electrostatic Sensor SK series

In-line type sensor head

Model			SK-300	SK-050
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Charge potential measurement	Measurement mode		High-accuracy mode, Wide-range mode
	Reference distance	High-precision mode	25 mm 0.98"
		Wide-range mode	100 mm 3.94"
	Measuring distance	High-precision mode	1 to 50 mm 0.04" to 1.97"	5 to 50 mm 0.20" to 1.97"
		Wide-range mode	60 to 120 mm 2.36" to 4.72"
	Measuring range	High-precision mode	±2 kV ^*1
		Wide-range mode	±50 kV ^1 ^2
	Measuring accuracy	High-precision mode	±1 V ^*3	±10 V ^*7
		Wide-range mode	±100 V ^*3	±100 V ^*7
	Sampling cycle		Approx. 1.4 ms
Temperature measurement	Measuring range		0 to 50°C 32 to 122°F
	Measuring accuracy		±1°C ±1.8°F ^*4
	Display resolution		0.1°C 0.18°F
	Sampling cycle		1 s
Humidity measurement	Measuring range		10 to 85% RH
	Measuring accuracy		±5% RH ^*4
	Display resolution		0.1% RH
	Sampling cycle		1 s
Ion balance measuring mode	Ion balance measuring range		±300 V ^*5	±1 kV ^*5
	Measuring accuracy		±3 V ^5 ^6	±10 V ^5 ^8
	Display resolution		0.1 V ^*5	1 V ^*5
Environmental resistance	Ambient temperature		0 to 50°C 32 to 122°F (No freezing or condensation)
	Relative humidity		85% RH or less (No condensation)	10 to 85% RH (no condensation)
	Pollution degree		3	-
Material			Body case: PC, Metal parts: SUS, Cable: PVC
Weight			Approx. 35 g 1.24 oz
^1 If the distance to the sensing target is shorter than the reference distance, even if the conditions are within the measurable range, measurement cannot be performed up to the upper limit of the measuring range. ^2 Measurement accuracy is satisfied in the range of ±30 kV. ^3 Within ±50 V when using high-accuracy mode; within ±1 kV when using wide-range mode. In other ranges, accuracy is ±2% (display value) in high-accuracy mode, and ±10% (display value) in wide-range mode. The value for high-accuracy mode is obtained from a mean of 1024 measurements. The value for wide-range mode is obtained from a mean of 256 measurements. ^4 At 25°C 77°F with 50% RH. ^5 OP-87934 is required. ^6 Within ±50 V. In other ranges, accuracy is ±6% (display value). ^7 Within ±100 V when using high-precision mode; within ±1 kV when using wide-range mode. In other ranges, display value has an accuracy of ±10% (display value). Values are obtained from a mean of 256 measurements. ^8 Within ±100 V. In other ranges, display value has an accuracy of ±10% (display value).

In-line type amplifier unit

Model		SK-3000	SK-3050	SK-1000	SK-1050
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Type		DIN rail mounting
Main unit/expansion unit		Main unit	Expansion unit	Main unit	Expansion unit
Display	Display resolution	0.1 V		0.001 kV
	Display range	-		±99.999 kV to 99 kV (4-level selection available)
Analog voltage output		±5 V, 1 to 5 V, 0 to 5 V, Output impedance: 100 Ω ^*1	None	±5 V, 1 to 5 V, 0 to 5 V, Output impedance: 100 Ω ^*1	None
Analog current output		4 to 20 mA, Max. load resistance: 350 Ω ^*1		4 to 20 mA, Max. load resistance: 350 Ω ^*1
Control input	Zero-shift input	Switchable between non-voltage input and voltage input [Non-voltage input] ON voltage: 2 V or less, OFF current: 0.02 mA or less [Voltage input] Maximum input rating: 30 V or less, ON voltage: 7.5 V or more, OFF current: 0.05 mA or less ^*2		Non-voltage input ^*6
	Timing input
	Reset input
	Bank input
Control output	Judgment output	Open collector output (NPN/PNP switching, N.O./N.C. switching) ^*3
	Alarm output	Open collector output (NPN/PNP switching, N.C.) ^*3
Power supply	Power supply voltage	10 to 30 VDC (including ripple (P-P) 10% or less) ^*4	Supplied from main unit ^*4	10 to 30 VDC (including ripple (P-P) 10% or less) ^*4	Supplied from main unit ^*4
	Power consumption	1650 mW or less (55 mA or less at 30 V) (excluding load current of each output) ^*5	1170 mW or less (39 mA or less at 30 V) (excluding load current of each output) ^*5	1650 mW or less (55 mA or less at 30 V) (excluding load current of each output) ^*5	1170 mW or less (39 mA or less at 30 V) (excluding load current of each output) ^*5
Environmental resistance	Ambient temperature	0 to 50°C 32 to 122°F (No freezing or condensation)
	Relative humidity	85% RH or less (No condensation)		10 to 85% RH (no condensation)
	Pollution degree	2		-
Material		Body case and front cover: PC, Key top: POM, Cable: PVC
Weight		Approx. 150 g 5.30 oz (including accessories)	Approx. 140 g 4.94 oz (including accessories)	Approx. 150 g 5.30 oz (including accessories)	Approx. 140 g 4.94 oz (including accessories)
^1 Select ±5 V, 1 to 5 V, 0 to 5 V, or 4 to 20 mA for use. ^2 Inputs are assigned to the four external input lines. ^3 NPN open collector output rating: maximum 50 mA/ch (20 mA/ch when expansion units are added), 30 V or less, residual voltage: 1 V or less (1.5 V or less when adding 6 or more expansion units, including main unit); PNP open collector output rating: maximum 50 mA/ch (20 mA/ch when expansion units are added), below power supply voltage, residual voltage: 2 V or less (2.5 V or less when adding 6 or more expansion units, including main unit) ^4 Use 20 to 30 V as the power supply voltage when using 6 or more expansion units, including the main unit. ^5 When connecting 8 units for DL connection, the maximum power consumption is 11.3 W. ^6 Inputs are assigned to the four external input lines. Non-voltage input rating: ON voltage 2 V or lower, OFF current 0.02 mA or lower. Voltage input rating: maximum input rating is 30 V, ON voltage 7.5 V or higher, OFF current 0.05 mA or below.