1. Product Overview
The Murphy by Enovation Controls ES2T-250/300-1/2 is a specialized 2-wire ungrounded temperature sender designed for use with electric temperature gauges. This component is crucial for accurate temperature monitoring in various industrial and scientific applications.
Key features include:
- Designed for use with electric temperature gauges.
- Features a 1/2-14 NPT thread size for secure installation.
- Capable of measuring temperatures up to a maximum of 300°F.
- Utilizes a 2-wire ungrounded configuration.
Figure 1: Front view of the Murphy ES2T-250/300-1/2 Temperature Sender, showing the threaded body and electrical terminals.
2. Setup and Installation
Proper installation is critical for the accurate and reliable operation of the temperature sender. Ensure all connections are secure and appropriate for the application.
2.1. Pre-Installation Checks
- Verify that the application's temperature range is within the sender's specifications (up to 300°F).
- Confirm that the mounting port has a 1/2-14 NPT thread to ensure compatibility.
- Ensure the electrical system is compatible with a 2-wire ungrounded sender.
2.2. Mounting the Sender
- Carefully thread the sender into the designated port.
- Tighten the sender securely, but do not overtighten, to prevent damage to the threads or the sender body.
- Use an appropriate sealant on the threads if necessary, following the sealant manufacturer's recommendations for temperature and fluid compatibility.
2.3. Electrical Connections
- Connect the two wires from the temperature gauge to the terminals on the sender.
- Ensure polarity is correct if specified by the gauge manufacturer.
- Secure the connections firmly to prevent intermittent readings or disconnections.
- Verify that all wiring is protected from heat, abrasion, and moisture.
3. Operating Principles
The ES2T-250/300-1/2 temperature sender operates by changing its internal electrical resistance in response to temperature variations. This change in resistance is then interpreted by a compatible electric temperature gauge, which displays the corresponding temperature reading.
- As temperature increases, the resistance of the sender typically changes in a predictable manner.
- The gauge measures this resistance and converts it into a temperature value.
- This sender is designed for continuous temperature monitoring within its specified range.
4. Maintenance
The ES2T-250/300-1/2 temperature sender is designed for durability and requires minimal maintenance. However, periodic checks can help ensure its continued accuracy and longevity.
- Visual Inspection: Periodically inspect the sender for any signs of physical damage, corrosion, or loose connections.
- Connection Integrity: Ensure that the electrical connections remain clean and tight. Loose connections can lead to inaccurate readings.
- Thread Seal: Check for any leaks around the threaded connection point. Reapply sealant if necessary.
- Cleaning: If the sender's exposed parts become dirty, gently clean them with a soft cloth. Avoid using harsh chemicals that could damage the material.
5. Troubleshooting
If you experience issues with your temperature sender, consider the following common problems and solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| No temperature reading or erratic readings |
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| Incorrect temperature reading |
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| Leakage at thread connection |
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6. Specifications
Detailed technical specifications for the ES2T-250/300-1/2 Temperature Sender are provided below. Refer to these specifications for compatibility and performance characteristics.
| Attribute | Value |
|---|---|
| Model Number | ES2T-250/300-1/2 |
| Type | 2-wire ungrounded temperature sender |
| Thread Size | 1/2-14 NPT |
| Maximum Temperature Rating | 300°F (148.9°C) |
| Product Dimensions (L x W x H) | 2.5 x 1 x 2 inches (6.35 x 2.54 x 5.08 cm) |
| Item Weight | 3.53 ounces (100 grams) |
| Manufacturer | Murphy by Enovation Controls |
| Material | Copper (Contact Material) |
| Operation Mode | Automatic |
| Contact Type | Normally Open |
| Connector Type | Female |
| Terminal | Screw |
| Circuit Type | 1-way |
| Actuator Type | Push Button |
| International Protection Rating | IP00 |
Figure 2: Datasheet excerpt for ESPS and ESTS series, providing general information on pressure and temperature combined senders/switches, including resistive sender output characteristics and switch contact details. This document provides context for the ES2T series.
Figure 3: Datasheet excerpt detailing dimensions for ESPS pressure models and ESTS temperature models, along with tables for sender resistance characteristics for both pressure (ESPS) and temperature (ESTS) models. The ESTS temperature model resistance table provides nominal resistance in Ohms at various temperatures (e.g., 37.8°C/100°F, 82.2°C/180°F, 104.4°C/220°F, 137.8°C/280°F).
7. Warranty and Support
For specific warranty information and technical support regarding your Murphy by Enovation Controls ES2T-250/300-1/2 Temperature Sender, please refer to the official documentation provided with your purchase or visit the manufacturer's official website.
Manufacturer: Murphy by Enovation Controls
For further assistance, contact the manufacturer's customer support or an authorized service center.