ELE-804 measures liquid level through a stainless steel gas-collection chamber and capillary. Pressure is transmitted through the gas chamber so the sensing element does not directly contact the measured liquid. This construction supports applications involving heat, impurities, deposits and fouling.
The transmitter combines a metal armored electronics head, a sealed junction box and a 304 stainless steel capillary. Automatic temperature compensation and linear calibration support signal stability. Applications include hot-liquid storage tanks, heating and boiler systems, industrial process vessels, and water, oil or other liquids compatible with 304 stainless steel.
| Parameter | ELE-804 |
|---|---|
| Measurement principle | Gas-collection-tube / air-chamber level measurement |
| Measuring range | 0-100m; customizable |
| Overload capacity | 150%FS |
| Operating temperature | 0°C to 120°C |
| Temperature compensation range | 0°C to 50°C |
| Storage temperature | -10°C to 80°C |
| Temperature drift | ±0.01%FS/°C |
| Response frequency | 10Hz |
| Accuracy | ±0.5%FS standard; ±0.25%FS or ±0.1%FS optional |
| Supply | 24VDC standard; 15-30VDC |
| Output signals | 4-20mA standard; 0-5V, 0-10V or RS485 optional |
| Communications | RS485 Modbus RTU, optional |
| Process connection | G1 thread standard |
| Connection material | 304 stainless steel; PTFE optional |
| Compatible media | Water, oil and liquids compatible with 304 stainless steel |
| Housing structure | Metal armored construction |
| Capillary material | 304 stainless steel |
Select the measuring range, accuracy, output and connection material for the liquid and control system. The 120°C operating limit, 0-50°C compensation range and storage range describe different conditions and should be considered separately. The stainless steel gas chamber isolates the sensing element from direct liquid contact; the chamber, capillary and process connection must still suit the measured medium.
The head provides terminal access for the ordered electrical output. The attached drawing identifies ELE-804 among the models supporting the illustrated two-wire current, three-wire voltage and current/RS485 connection arrangements.
ELE-804S adds a local LCD to a stainless steel pressure-transfer configuration. ELE-804F and ELE-804SF use a corrosion-resistant pressure-transfer construction for liquids compatible with PTFE; ELE-804SF includes local digital indication. Select the model-specific range and mounting arrangement below.
| Parameter | ELE-804S | ELE-804F | ELE-804SF |
|---|---|---|---|
| Type | Digital pressure-transfer level transmitter | Corrosion-resistant pressure-transfer level transmitter | Digital corrosion-resistant pressure-transfer level transmitter |
| Range selections | 0.3–500mH₂O | 0.3–50mH₂O | 0.5–50mH₂O |
| Compatible media | Liquids compatible with 304 stainless steel | Liquids compatible with PTFE | |
| Probe diameter | 28mm | 30mm | |
| Mounting | Bracket or G1 thread | Bracket | |
| Output choices | Two-wire 4–20mA; three-wire 1–5V or 2–10VDC; four-wire RS485 | ||
| Electrical entry | M20×1.5 | ||
| 4–20mA supply | 10–30VDC | ||
| 2–10V supply | 12–30VDC | ||
| Accuracy | ±0.2% or ±0.5% | ±0.5% | |
| Overload | 1.5× full scale standard; special versions available | ||
| Temperature | 0–100°C | ||
| Protection designation | Ex d IIC T6 Gb | IP68 probe construction | |
| Pressure / construction | Gauge pressure; pressure-transfer construction | Pressure-transfer construction | |
| LCD | 4 digits | None | 4 digits |
The selected transmitter, probe assembly and installation must suit the required liquid head and media compatibility. Temperature and output specifications for these variants apply to their individual configurations.
