HT-30 Brass Water Flow Switch – CO₂ Laser Cooling System

LASER PARTS | WATER COOLING & CHILLERS

HT-30 Brass Water Flow Switch – CO2 Laser Cooling System

The HT-30 is an inline water flow switch used to monitor coolant circulation in compatible CO2 laser cooling systems. Installed in the water line, it provides a flow-dependent switching signal that can be used by a properly configured laser protection or monitoring circuit.

The switch features a brass body, red sensor housing, two hose-barb connections, and an attached electrical cable with a two-contact connector. A directional arrow on the housing identifies the intended water flow direction.

Maintaining adequate coolant circulation is essential for protecting water-cooled CO2 laser tubes. When properly connected to compatible equipment, a flow switch can help the control system detect a loss of circulation and respond according to its protection settings.

Important: This component detects a flow condition. It does not measure actual flow rate or regulate water circulation. Verify compatibility with your existing cooling system before ordering.

Key Features

• Water Flow Detection: Provides a flow-dependent switching signal for compatible cooling-system monitoring circuits.
• Brass Body: Metal water passage with threaded fitting connections.
• Hose-Barb Connections: Supplied with two barbed fittings, as shown in the product photographs.
• Flow Direction Indicator: Arrow on the red housing identifies the intended direction of water movement.
• Two-Contact Connector: Attached cable with a two-contact electrical connector for compatible equipment.
• Inline Installation: Designed for installation within a matching cooling-water line.
• Replacement Application: Suitable for replacing a matching HT-30-style flow switch when electrical and mechanical specifications are compatible.

Product Specifications

Product Type	Inline Water Flow Switch
Model Identification	HT-30
Body Material	Brass
Sensor Housing	Red Enclosed Housing
Water Connections	Two Hose-Barb Fittings
Flow Direction	Marked on Sensor Housing
Electrical Connection	Attached Cable with 2-Contact Connector
Application	Compatible CO2 Laser Water-Cooling and Flow-Monitoring Systems
Quantity Included	1 Flow Switch Assembly with 2 Hose-Barb Fittings
Rabbit Laser USA SKU	122

Specification Note: The original product listing references a 110VAC, 0.2A electrical rating, G1/2 thread connections, and a 1.5 L/min flow threshold. These values require confirmation for this exact HT-30 configuration before being used as verified specifications.

How the Water Flow Switch Works

The HT-30 is designed to respond to water moving through its internal passage. A compatible monitoring circuit can use the switch's electrical output to distinguish between defined flow conditions.

When properly installed and wired, this signal can be used as part of a laser machine's water-cooling protection system.

The switch does not display a flow rate or measure the exact amount of water moving through the system. It should not be used as a substitute for verifying adequate coolant flow.

Compatibility

This HT-30-style flow switch is intended for compatible CO2 laser cooling systems using a matching inline flow sensor and electrical connection.

Before ordering, compare the replacement with your existing component, including:

• Existing flow switch model and housing design
• Thread size and hose-barb dimensions
• Cooling-water tubing size
• Electrical connector and wiring arrangement
• Switch contact ratings and operating behavior
• Flow activation threshold
• Installation orientation and available clearance

Important: Different HT-30 variants may have different port sizes and electrical characteristics. A similar appearance does not guarantee compatibility with your laser machine or water chiller.

Installation & Safety

• Turn off and disconnect the laser machine and cooling equipment from electrical power before servicing.
• Drain or isolate the cooling-water line before removing the existing sensor.
• Confirm that the replacement fittings match the tubing and water connections.
• Install the flow switch according to the direction arrow on its housing.
• Secure hoses using appropriate fittings and clamps to prevent leaks.
• Verify the connector wiring, switching behavior, and electrical ratings before connecting the sensor to the equipment.
• Refill the cooling system and remove trapped air according to the equipment manufacturer's instructions.
• Check all connections for leaks and verify water circulation and protection-circuit operation before running the laser.

Safety Note: Never bypass a laser's water-flow protection circuit. Do not apply electrical power based solely on the voltage listed in an older product description. Confirm the actual switch contact ratings and equipment wiring requirements first.