ENL404F1094 ELITE Pressure Limit Control 20–300 PSI, Mercury-Free SPDT
Ensure safe and reliable operation of your high-pressure boiler or oil system with the ENL404F1094 ELITE Pressure Limit Control. This mercury-free SPDT switch operates within a 20–300 PSI range with a 20–50 PSI differential, delivering precise control for demanding systems. The stainless steel diaphragm and brass pressure joint guarantee long-lasting durability, while the clear plastic housing cover allows instant visual monitoring of the pressure setpoint. Ideal for oil, water, air, and other non-corrosive media, this ELITE control is easy to install with a standard 1/4-18 NPT thread, making it perfect for commercial or industrial applications.
✅ Replaces Honeywell L404F1094 – Direct replacement for Honeywell parts, making system upgrades or repairs simple and reliable.
🔥 Key Features of the ENL404F1094
✅ Mercury-Free & Environmentally Safe – Protects the planet without sacrificing performance.
✅ High-Pressure Accuracy – Maintains 20–300 PSI with 20–50 PSI differential for consistent system operation.
✅ Rugged & Reliable Construction – Stainless steel diaphragm and brass pressure joint for long-lasting durability.
✅ Clear Pressure Setpoint View – Transparent housing lets you instantly confirm settings.
✅ Versatile SPDT Functionality – Works with oil, water, air, and other non-corrosive media.
✅ Simple & Quick Installation – Standard 1/4-18 NPT thread allows fast, hassle-free setup.
💻 Technical Specifications
| Specification | Details |
|---|
| Model |
ENL404F1094 ELITE Pressure Limit Control |
| Type |
Pressure Limit Control / SPDT Switch |
| Pressure Range |
20–300 PSI ✅ |
| Differential |
20–50 PSI ✅ |
| Max Diaphragm Pressure |
350 PSI ✅ |
| Max Ambient Temperature |
150.8°F (66°C) ✅ |
| Electrical Rating |
15A @ 250 VAC |
| Interface Thread |
1/4-18 NPT ✅ |
| Contact Type |
SPDT ✅ |
| Housing |
Clear Plastic Cover |
| Diaphragm Material |
Stainless Steel ✅ |
| Pressure Joint Material |
Brass ✅ |
| Media Compatibility |
Oil, water, air, other non-corrosive liquids ✅ |
| Installation Orientation |
Vertical or horizontal |
| Environment |
Indoor; -20°F to 150.8°F (-29°C to 66°C) ✅ |
| Safety & Compliance |
Mercury-free, environmentally safe ✅ |
📊 ENL404F ELITE Series Quick Reference Chart
| Feature / Spec | ENL404F1060 | ENL404F1078 | ENL404F1094 | ENL404F1102 |
|---|
| Pressure Range |
2–15 PSI |
5–50 PSI |
20–300 PSI |
10–150 PSI |
| Differential |
2–6 PSI |
6–14 PSI |
20–50 PSI |
10–22 PSI |
| Max Diaphragm Pressure |
25 PSI |
85 PSI |
350 PSI |
225 PSI |
| Max Ambient Temperature |
150.8°F (66°C) |
150.8°F (66°C) |
150.8°F (66°C) |
150.8°F (66°C) |
| Max Electrical Rating |
15A @ 250 VAC |
15A @ 250 VAC |
15A @ 250 VAC |
15A @ 250 VAC |
| Interface Thread |
1/4-18 NPT |
1/4-18 NPT |
1/4-18 NPT |
1/4-18 NPT |
| Contact Type |
SPDT |
SPDT |
SPDT |
SPDT |
| Housing |
Clear Plastic Cover |
Clear Plastic Cover |
Clear Plastic Cover |
Clear Plastic Cover |
| Typical Applications |
🔹 Low-pressure boilers, oil systems |
🔹 Medium-pressure boilers, heating systems |
🔹 Industrial & high-pressure process systems |
🔹 Higher-pressure boilers & water systems |
| Honeywell Cross Reference |
L404F1060 |
L404F1078 |
L404F1094 |
L404F1102 |
⚡ Common Issues Solved
-
High-pressure fluctuations in boiler or oil systems
-
Overpressure or underpressure in industrial applications
-
Faulty SPDT switch affecting system control
-
Need for mercury-free, safe, high-pressure control
❓ Frequently Asked Questions (FAQ)
Q1: Can this switch be used with corrosive liquids?
A: No — only suitable for oil, water, air, and other non-corrosive media.
Q2: Is the thread size customizable?
A: Standard is 1/4-18 NPT; other threads can be requested when ordering.
Q3: What is the maximum operating temperature?
A: Up to 150.8°F (66°C).
Q4: Is this switch mercury-free?
A: Yes — it is completely mercury-free and environmentally safe.
Q5: Can it be used in both residential and commercial systems?
A: Yes — it’s suitable for industrial and commercial high-pressure systems.
Q6: How do I know if this model is right for my system?
A: Check the ENL404F ELITE Series Quick Reference Chart for pressure range, differential, and application compatibility.
Q7: How often should the switch be inspected or replaced?
A: Annual inspection is recommended. Replace immediately if there are signs of wear, diaphragm damage, or inconsistent pressure readings.
Q8: Can multiple switches be used in one system?
A: Yes — adding additional switches improves system monitoring and safety for larger setups.
🛒 Shopping Tips / Buyer Guidance
✅ Confirm System Pressure – Ensure your system operates within the 20–300 PSI range.
✅ Check Compatibility – Use the ENL404F ELITE Series Quick Reference Chart before purchasing.
✅ Media Matters – Designed for oil, water, air, and non-corrosive liquids only.
✅ Thread Size Check – Standard 1/4-18 NPT, verify your system connection.
✅ Plan Maintenance – Inspect annually; replace if signs of wear appear.
✅ Consider Multiple Units – For larger systems, extra switches enhance monitoring and safety.
✅ Eco-Friendly Choice – Mercury-free design protects the environment.
