Product Overview

The Phares ZS09R Zero Speed Switch Sensor is a self-contained speed monitoring device designed for industrial equipment and conveyors. It combines a sensor and relay in one unit to detect overspeed, underspeed, or zero speed conditions. Ideal for manufacturing environments, the ZS09R helps protect machinery by triggering alerts or shutdowns when equipment slows or stops unexpectedly. With an adjustable set point, it offers precise and reliable speed detection to keep operations running efficiently.

Product Detail

The ZS09R Zero Speed Switch Sensor resembles a proximity switch but features advanced speed sensing technology not found in basic on/off sensors. Designed for industrial machinery, it continuously monitors shaft rotation. When the machine speed reaches the adjustable set point, the built-in relay changes state. It stays in this state until the system detects an underspeed or zero speed condition, making it ideal for conveyor and equipment monitoring in manufacturing plants.

The ZS09R Zero Speed Switch Sensor is ideal for monitoring shaft speed and sending logic-level signals to PLCs, VFDs, DCS systems, and other control equipment in industrial applications. For higher amperage switching, consider the ZS09P model. The ZS09R detects both magnetic and high iron content targets such as gear teeth, bolt heads, or key stock, making it a reliable solution for conveyor systems and rotating machinery in manufacturing plants.

The ZS09R Zero Speed Switch Sensor features isolated outputs, allowing for easy integration into both new and existing control systems. It’s also suitable to replace many outdated or lower-quality speed sensors in industrial applications.

Install the ZS09R Zero Speed Switch Sensor at the load pulley on equipment such as augers, bucket elevators, conveyors, exhaust fans, turbines, and other rotating machinery. It’s useful for accurate shaft speed monitoring in industrial and manufacturing applications.

Specifications

Options

• Custom Cable Length
• Custom Relay Set-Point Adjustment Range
• Fixed Set-Point
• Relay Latch

Wiring & Installation

Installation is simple:

1. Mount the ZS09R sensor and aim at a rotating target such as a bolt head, key stock, flat washer, or magnet. When using a ferrous metal target, ensure it has a high iron content. Stainless steel and iron alloys are not suitable and will not trigger the sensor reliably.
2. Connect relay contacts (N.O. or N.C.) to your control circuit.
3. Adjust the relay setpoint to match your application requirements using the trim pot on the sensor.

LED indicators show sensor and relay status at a glance.

Frequently Asked Questions

Q: Do I need a separate controller?

A: No. The ZS09R includes both sensor and relay output.

Q: What happens if the shaft stops?

A: When a stop or under speed condition is detected, the relay LED turns off and the relay disengages, returning to its default (normal) state.

Q: How close should the sensor be to the target?

A: For ferrous targets, a minimum of 1/16″ (6 mm) to approximately 5/16″ (7.94 mm).

When using a Phares Electric magnet or magnetic disk, the recommended sensing distance ranges from approximately 1/4 inch (6.35 mm) to 1 inch (25.4 mm), depending on the specific magnetic target selected.