JNS-Q Contact Displacement Grating Sensor

Name: JNS-Q Contact Displacement Grating Sensor
Brand: DAIDISIKE
SKU: jns-q-contact-displacement-grating-sensor

Digital, RS-485-networkable contact displacement sensor with resolution down to 0.2 micron for inline dimensional inspection.

JNS-Q Contact Displacement Grating Sensor - product photo

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Technical Specifications

Output	Catalogue-listed options: 5V RS485; relevant 24V RS232/RS485 / Modbus RTU and O1/O2 limit signals. Confirm exact probe/controller configuration; options are not all present on every model.
Measuring range	12.7mm (JNS-Q120 series); 25.4mm (JNS-Q250 series)
Resolution (variant dependent)	Catalogue family options: 0.2μm (high-precision) to 5μm (basic); confirm selected variant. Not absolute accuracy or Q120 repeatability.
Repeatability	JNS-Q120: ±2μm (confirmed). Other family variants require their own specification.
Operating voltage	5V type: DC5V (<50mA); 24V type: DC24V
Protection rating	Current JNS-Q120 IP54/IP65 references unresolved; confirm the exact probe, connector and controller configuration.
Pneumatic air source	Historical catalogue: Φ4 tubing, 0.16-0.2MPa on pneumatic variants; verify current actuation/pressure for the exact order, including Q120Q24.
Communication baud rate	Catalogue lists 38400bps Modbus RTU on relevant configurations; confirm the selected interface/controller.
Multi-drop capacity	Configuration-specific. Historical material lists different software/network counts; confirm supported connected devices, address capacity and topology.
Display controller	Optional for JNS-Q120; specify controller model, output interface and included accessories when ordering.

Overview

JNS-Q is a contact-type digital displacement sensor whose measuring core is an optical grating (photoelectric linear encoder) with moire-fringe interpolation, rather than a conventional potentiometer or LVDT coil. A spindle with a contact stylus touches the workpiece and the grating reads the linear displacement digitally. JNS-Q120 is confirmed with 12.7 mm measuring range and ±2 μm repeatability. Repeatability is not display resolution or absolute measuring accuracy; the family's catalogue resolution options of 0.2–5 μm must be checked for the selected variant.

It is intended for manufacturing and quality-control engineers performing contact gauging, multi-point flatness/thickness checks and inline sorting where the workpiece can be physically contacted. The catalogue includes spring-return, air-push and on-body digital-display variants, and 5V/24V communication configurations. A separate display controller is optional, not included by default. Confirm the exact probe, display/controller, output interface and software/network capacity as one order configuration.

Key Facts — JNS-Q at a glance

JNS-Q120 is confirmed with 12.7 mm measuring range and ±2 μm repeatability. The 0.2–5 μm catalogue resolution range describes family variants, not the Q120 repeatability or absolute accuracy.
The JNS-Q is available in two standard measuring ranges: 12.7 mm (JNS-Q120 series) and 25.4 mm (JNS-Q250 series).
RS232/RS485 and Modbus RTU are catalogue-listed options on relevant configurations. Confirm the exact voltage/interface, controller, protocol and supported network size; published software-device counts and bus-address capacity are not interchangeable.
O1/O2 limit-alarm signals are catalogue-listed configuration options for GO/NG evaluation. Confirm their presence, logic and load rating on the ordered probe/controller combination.
The catalogue includes pneumatic spindle variants. Confirm the exact actuation version, tubing, pressure and measuring force from the current order-specific specification.
JNS-Q120's display controller is optional. IP54/IP65 references have not yet been reconciled to one current configuration; verify the applicable environmental rating before specifying coolant or washdown use.

Features & Benefits

Sub-micron resolution via optical grating principle

Optical-grating variants list resolution from 0.2 μm (high-precision) to 5 μm (basic). JNS-Q120 repeatability is confirmed as ±2 μm, a separate quantity from resolution and absolute accuracy. Assess the complete fixture and measurement uncertainty against the required tolerance.

Three spindle actuation types on one platform

The catalogue shows spring-return, pneumatic and on-body digital-display variants. JNS-Q120's separate display controller is optional. Match the complete order code to the actuation method, current pressure/force specification and chosen display arrangement; do not infer included accessories from a family photograph.

RS-485 networking matched to the selected configuration

Catalogue configurations include 5V RS485 and 24V RS232/RS485 with Modbus RTU. Confirm the protocol, interface hardware, address capacity and supported software-device count before designing a multi-point fixture; historical images quote different capacities and do not establish one guaranteed total for every model.

Configuration-specific O1/O2 limit-alarm options

Where the ordered probe/controller supports O1/O2, limit signals can report a tolerance result to suitable control equipment. Check output type, current rating and load interface; an alarm signal does not by itself establish that a reject actuator can be driven directly.

Built-in peak-hold and peak-to-peak measurement modes

Catalogue configurations list real-time value, peak hold (MAX), bottom hold (MIN) and peak-to-peak (MAX-MIN) functions. Verify which functions are provided by the selected probe, optional controller or software before relying on them for runout or stroke measurement.

Check the current environmental specification

IP54 and IP65 references remain unresolved for the current JNS-Q120 configuration. Confirm the ordered probe, connector and optional controller ratings and the actual coolant or cleaning conditions; do not assume additional protection is unnecessary.

Two standard ranges matching common indicator strokes

12.7 mm (JNS-Q120 series) and 25.4 mm (JNS-Q250 series) correspond to the 0.5-inch/1.0-inch strokes commonly used on dial indicators, easing replacement of analog indicators and imported digital gauge probes in existing fixtures.

Applications

In-process CNC dimensional inspection — The micron-level resolution and contact measurement method suit tool positioning and inline sampling or full inspection of workpiece dimensions at machining stations.

Multi-point flatness/parallelism/thickness fixtures — Multiple contact probes can support combined flatness, parallelism and thickness measurement. Determine the supported controller/software channel count and communication arrangement for the actual configuration before fixing the number of stations.

Shaft radial runout inspection — A configuration with verified MAX/MIN and peak-to-peak evaluation can support shaft runout measurement, with the fixture and measurement conditions assessed separately.

Inline plate/sheet thickness monitoring — Contact measurement with real-time value output supports inline thickness monitoring of plate or sheet material.

Automated assembly-line GO/NG sorting — Where available on the selected probe/controller, O1/O2 limit signals can report a GO/NG decision to suitable control equipment; confirm the load interface rather than assuming direct actuator drive.

Material testing - micro deformation monitoring — Sub-micron resolution is suited to capturing small displacement changes during material testing such as tension/compression trials.

Manual inspection benches with direct readout — The catalogue shows an on-body digital-display variant; a separate JNS-Q120 display controller is optional. Specify the desired readout arrangement and included accessories in the order.

Automated stations with anti-wear stylus contact — The air-push spindle extends only when the workpiece is in place, reducing stylus wear on automated lines.

Models & Ordering Information

5V type

JNS-Q120AJNS-Q250AJNS-Q120SJNS-Q120Q

Single-channel RS485 output. JNS-Q120A/JNS-Q120S/JNS-Q120Q: 12.7mm range; JNS-Q250A: 25.4mm range. The listed suffixes are catalogue options; confirm actuation, interface and display/controller supply for the exact order.

24V type

JNS-Q120A24JNS-Q250A24JNS-Q120S24JNS-Q120Q24

Catalogue lists RS232/RS485 and Modbus RTU (38,400 bps) for relevant 24V configurations. Verify actual network capacity and software limits; JNS-Q120A24/S24/Q24 range is 12.7 mm, while JNS-Q250A24 is the separate 25.4 mm family option.

How to Select

Need 12.7mm (0.5-inch) stroke: select the JNS-Q120 configuration with confirmed ±2μm repeatability; this is not its display resolution or absolute accuracy.
Need 25.4mm (1.0-inch) stroke: choose the JNS-Q250 series.
Fixed fixture, continuous contact measurement: choose the spring-return type (A suffix), which relies on an internal spring for return.
For intermittent pneumatic contact, verify the Q-suffix actuator arrangement, current air-pressure specification and measuring force; the Q120Q24 description remains a version-reconciliation item.
For local readout, compare the catalogue's on-body display variant with an optional external display controller. JNS-Q120's controller is not supplied by default unless included in the quotation.
Single-point application, cost-sensitive, single-channel RS485 only: choose the 5V type (JNS-Q120A / JNS-Q250A / JNS-Q120S / JNS-Q120Q).
For multi-point RS232/RS485 networking, compare the relevant 24V configurations and confirm controller/software capacity, protocol and permitted topology for the complete order.
For GO/NG evaluation, confirm whether O1/O2 signals exist on the selected probe/controller and whether an external interface is needed for the actual load.
For a pneumatic variant, confirm tubing, operating pressure and measuring force from the current model-specific sheet; do not close the Q120Q24 actuation conflict from its suffix alone.

📘 Need the full method? NPN vs PNP Sensor Outputs Explained

When NOT to specify the JNS-Q — and what to use instead

The target must not be physically touched -- delicate, soft, coated, or fast-moving surfaces

Why not: The FAQ confirms JNS-Q is a contact-type sensor: a spindle with a contact stylus physically touches the workpiece, distinguishing it explicitly from non-contact sensors.

Use instead: A non-contact laser displacement sensor from this manufacturer's separate laser displacement sensor product line, as the FAQ itself references.

The required measuring stroke exceeds 25.4 mm

Why not: The two standard ranges documented are 12.7 mm (JNS-Q120 series) and 25.4 mm (JNS-Q250 series) -- no longer-stroke model is listed.

Use instead: Confirm with DAIDISIKE whether a longer-stroke variant exists, or consider a non-contact laser/optical displacement sensor with a longer range.

An automated line where repeated stylus contact would cause unacceptable wear, and the spring-return type is being specified by default

Why not: Repeated stylus contact can cause wear or affect the workpiece. The selected actuation method and measuring force must suit the actual contact cycle; no universal wear-life improvement is established here.

Use instead: Evaluate the exact pneumatic variant or a non-contact method after confirming current actuation, pressure, force and fixture requirements.

A multi-point system needs RS232/RS485-selectable networking beyond a single channel, but the 5V-type model is being priced

Why not: The catalogue distinguishes 5V single-channel and 24V interface options, but historical software/network counts differ. A family headline does not establish the supported station count for the order.

Use instead: Specify the complete probe/controller/software network and obtain written channel-count, protocol and topology confirmation.

Specifications we do not publish yet

We only publish a figure once we are confident it is true. The items below are still being validated through further testing and real-world customer feedback, so for now we would rather leave them open than guess. If one of them matters to your design, ask us for the latest validated status.

Response time is not documented
Operating temperature range is not documented
Overall dimensions are not documented
Housing/stylus material is not documented
Certification documents beyond "available on request" are not specified
Contact/measuring force of the stylus is not documented
Stylus tip wear life or recommended service interval is not documented
The meaning of the JNS-Q120Q24 model suffix is unresolved -- source pages show a conflict between a "spring-return" description and the pneumatic "Q" suffix for this specific model
Current JNS-Q120 protection rating: IP54/IP65 references need exact-version reconciliation; measuring range12.7mm, repeatability±2μm and optional display controller are already confirmed.
Exact output/controller configuration, analog range, communication protocol and simultaneous capabilities need order-specific confirmation; historical software/network counts differ.

Frequently Asked Questions

What measuring principle does the JNS-Q sensor use?

JNS-Q uses an optical grating (photoelectric linear encoder) with moire-fringe interpolation rather than a potentiometer or LVDT coil. It is still a contact-measurement system whose actual accuracy depends on the selected probe, fixture, environment and evaluation setup.

What is the resolution and repeatability of the JNS-Q?

JNS-Q120 repeatability is confirmed as ±2 μm with a 12.7 mm range. This is not a display-resolution or absolute-accuracy specification. Catalogue resolution options of 0.2–5 μm belong to family variants and must be matched to the exact model.

What measuring ranges are available?

Two standard ranges: 12.7 mm (JNS-Q120 series) and 25.4 mm (JNS-Q250 series).

Can multiple JNS-Q sensors be networked together?

Catalogue configurations support multi-point arrangements, but the exact controller, software, interface and network limit must be confirmed together. Historical images quote different software-device and network capacities; do not treat them as one guaranteed maximum for every JNS-Q.

Does the JNS-Q support GO/NG sorting without a PLC or host computer?

O1/O2 limit-alarm functions are listed for relevant configurations. Confirm the selected probe/controller's functions, output current and suitable load interface. A display controller is optional for JNS-Q120; do not assume every probe has all limit/evaluation functions built in.

What measurement modes are built into the sensor?

The catalogue lists real-time, MAX, MIN and MAX–MIN evaluation. Confirm whether the ordered configuration implements these in the probe, optional controller or software.

What is the difference between the spring-return, air-push, and digital-display versions?

The catalogue distinguishes spring-return, pneumatic and on-body display variants. Confirm the exact actuation and display arrangement from the current order code; the Q120Q24 actuation description is still unresolved. JNS-Q120's separate display controller is optional, not included by default.

What environmental protection rating does the JNS-Q have?

The current JNS-Q120 IP54/IP65 references have not been reconciled. Request the exact probe, connector and optional controller rating and permitted cleaning conditions before specifying coolant-splash or washdown use.

Is the JNS-Q a contact or non-contact sensor?

It is a contact-type sensor - a spindle with a contact stylus physically touches the workpiece. For non-contact, longer-range, lower-precision measurement, this manufacturer's laser displacement sensors are a separate product line.

What supply voltage does the JNS-Q require?

The catalogue lists 5V and 24V configurations. Match the actual supply, connector and communication interface to the complete order code; optional display/controller and analog/communication arrangements are configuration-specific.

Is the JNS-Q certified to any specific standards?

Certification documents are available on request.

Is a display controller included with JNS-Q120?

No. The display controller is optional. Include the required controller model, readout/evaluation functions and output/interface arrangement in the quotation.

Related Categories and Example Products

Explore other functions that may be needed in a machine or line. The products below are category examples, not pre-validated electrical or safety combinations. Confirm each interface and application separately: Laser Displacement Sensors · Proximity Sensors