Skip to main content

We launched a new site in September 2025. If you are a previous customer, you will need to set a new password.

ST420 High Speed Shaft Sensor

ST420 High Speed Shaft Sensor

Part #: 800-001621 In Stock: Ready to Ship Contact for Availability Stock: Select Options for Details
$427.00
800-001621
pdf_1_name:
Spec Sheet
pdf_1_url:
pdfs/Shaft-Speed-Sensor.pdf
hide_matrix:
True
in_stock:
False
sales_description:
Electro Sensors Shaft Speed Sensor, ST420 high speed 0.2 - 2,000 RPM, 8 Pulses Per Revolution (PPR).
parent_sku:
800-001621
facet_features:
LoRaWAN
facet_lorawan_sensor:
Pressure
facet_temperature_range:
Standard
facet_type:
Sensor
Adding… The item has been added
Commonly Purchased with:
258 Standard Pulser Disc
$133.00
TT420Z 4" Probe Temp Sensor
$250.00

Details

Electro Sensors Shaft Speed Sensor, ST420 high speed 0.2 - 2,000 RPM, 8 Pulses Per Revolution (PPR).

The patented ST420 detects passing magnets of a shaft-mounted pulser disc or wrap and outputs a smooth, continuous 4-20 mA analog signal in direct proportion to shaft rotation speed.

Features

  • 2-wire, loop-powered 4-20 mA analog output
  • No user calibration: works right out of the box
  • Works with shaft-mounted pulser targets (disc/wrap)
  • Rugged stainless steel M18x1 housing
  • Reverse-wiring protected
  • UL listed, Intrinsically Safe (IS)
  • Class I, Div I (C, D) Class II, Div I (E, F, G) when used with an IS barrier.

Documentation

Spec Sheet

Related Items

Featured Services

Front-End Engineering

Front-end engineering defines project requirements, evaluates existing conditions, and develops a design including a detailed Bill of Materials (BOM). This early phase work reduces risk, improves accuracy, and builds a strong foundation for reliable, successful project execution.
Learn More

Configuration, Installation, and Commissioning

This service ensures technology is properly set up, integrated, and fully operational. This includes customizing system settings, physically deploying equipment, testing functionality, and validating performance—delivering reliable, secure, and efficient operations from day one.
Learn More

Post-Project Support

Post-project support provides ongoing assistance after deployment to ensure systems remain reliable, secure, and optimized. Services include troubleshooting, updates, performance reviews, training, and maintenance, helping organizations maximize uptime, adapt to changes, and extend the life of their investments.
Learn More

Training

Classroom and field-based training combine theoretical instruction with hands-on practice. Participants learn core concepts, industry standards, and operational procedures in the classroom, then apply skills directly on equipment—building confidence, competence, and readiness for real-world environments.
Learn More

Provisioning

Provisioning services prepare equipment before shipment for secure, efficient deployment by installing firmware, applying updates, configuring connectivity, and loading applications. Devices are tested, documented, and delivered ready-to-use—reducing errors, accelerating rollout, and ensuring seamless integration into your operations.
Learn More

Need Help Finding the Right Product?

Contact us today for product recommendations tailored to your unique application requirements.
Contact Us

Request Quote

Reach out for a quote from our team with get back to you as soon as possible.

!