Winland HA-4

The Winland HA-4 is a wired electronic humid alert-4 humidity sensor. The Humidity Alert 4 is compatible with the EnviroAlert Professional Gateway, EnviroAlert 200 series, EnviroAlert 400 series, and the EnviroAlert 800-IP series gateways. The sensor connects to a gateway with 18-22 AWG twisted pair wire up to 1,000' long.

The Winland HA-4 is a wired electronic humidity sensor designed to provide accurate monitoring of ambient humidity levels in a single room or controlled environment. It is part of the Winland EnviroAlert ecosystem and is used as an accessory sensor for compatible monitoring systems, allowing users to track humidity conditions and receive alerts when levels fall outside acceptable ranges.

This sensor measures relative humidity from 5% to 95% RH and provides accurate readings within ±3% across the most critical operating range. It uses a capacitive sensing element, which is designed for stable and consistent performance over time. This makes it suitable for applications where maintaining proper humidity levels is important, such as equipment rooms, storage areas, or environmental monitoring setups.

The HA-4 connects to a compatible EnviroAlert gateway using 18–22 AWG twisted pair wiring, with support for cable runs up to 1,000 feet. This allows flexible placement of the sensor in locations that may be far from the monitoring system. It is designed for integration with systems such as the EnviroAlert Professional Gateway and the 200, 400, and 800-IP series monitors.

This sensor is capable of operating in a wide range of environments, including cooler and freezer applications. With an operating temperature range from -40°F to 140°F, it can be used in demanding conditions where environmental monitoring is critical. This makes it a practical choice for commercial, industrial, and specialized storage environments.

The HA-4 is surface mounted and features a compact housing that allows it to be installed in a variety of locations. It is powered by 12 to 24V DC and consumes minimal power, making it efficient for continuous monitoring applications.

The Winland HA-4 is a reliable solution for monitoring humidity in critical environments, providing accurate readings and flexible installation options as part of a larger environmental monitoring system.

Specifications

• Manufacturer: Winland Electronics
• Model: HA-4
• Device Type: Wired humidity sensor
• Humidity Range: 5% to 95% RH
• Accuracy: ±3% RH (25%–75% range)
• Sensing Element: Capacitive / IC
• Response Time: < 12 minutes
• Power Requirements: 12–24V DC, 0.21W max
• Wiring: 18–22 AWG twisted pair
• Max Cable Distance: Up to 1,000 ft
• Operating Temperature: -40°F to 140°F
• Mounting: Surface mount
• Dimensions: 3.9 × 2.9 × 1.7 in (L × W × H)
• Weight: 5.3 oz
• Compatibility: EnviroAlert Professional, 200, 400, and 800-IP series
• Use Case: Environmental humidity monitoring