Description
General Information
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Type: Electronic level switch
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Model Code: ENS 311P-8-0410-000-K
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Division: ELECTRONICS, LEVEL SENSORS
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Packaging Unit: EA (each)
Mechanical Connections
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Sensor Length: 19.68 in (500 mm)
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Active Probe Zone: 11.42 in (290 mm)
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Mechanical Interface: 22 mm collar for G22L cutting-ring coupling
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Connection Material: Ceramic
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Display: 4-digit, 7-segment red LED (7 mm high)
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Weight: approx. 180 g / 220 g / 250 g / 300 g (length-dependent)
Electrical & Power Supply
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Electrical Connection: M12×1 male, 8-pole
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DC Supply Voltage: 18–35 V (UL: limited energy, Class 2; LPS)
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Residual Ripple: ≤ 5 %
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Max. Total Current Consumption: 2.47 A
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Max. Idle Current (2 analog outputs): 90 mA
Outputs
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Switch Outputs: 4 PNP transistor (1 or 2 optional)
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Analogue Outputs: 2 (level & temperature)
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Analog Load Resistance:
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1–2 SP: 1…500 Ω
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4 SP (with temp. sensor): ≥ 1 kΩ
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Max. Switching Current (per 4 SP): 0.25 A
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Switching Cycles: > 100 million
Technical Limits
| Parameter | Value |
|---|---|
| Max. Tank Pressure | 0.5 bar (7.25 psi) |
| Short-Term Max. Pressure (<1 min) | 3 bar (43.5 psi) |
| Vibration Resistance | ≤ 5 g (0–500 Hz, DIN EN 60068-2-6) |
| Shock Resistance | ≤ 25 g (1 ms, DIN EN 60068-2-29) |
| Supply Ripple | ≤ 5 % |
Input Data
| Parameter | Value |
|---|---|
| Sensor Type | Capacitive fluid level sensor |
| Max. Level Change Rate | 2.36 in/s |
| Repeatability (full scale) | ≤ ±2 % (calm fluid) |
| Switch Point Accuracy | ≤ ±2 % (full scale) |
| Temp. Measuring Range | –13…+212 °F (–25…+100 °C) |
| Temp. Accuracy | ±3 °F (±1.7 °C) |
| Reaction Time (t₉₀) | 180 s |
Environmental Conditions
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Operating Temp.: 0…+60 °C (32…140 °F)
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Storage Temp.: –40…+85 °C (–40…176 °F)
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Fluid Temp.: 0…+60 °C (32…140 °F)
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Compensated Range: 0…+60 °C (32…140 °F)
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Protection Class: IP 67 (DIN IEC 60529)
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Certifications: CE (EN 61000-6-1/2/3/4), cUL US E318391
Setting Ranges
| Setting Type | Range | Increment |
|---|---|---|
| Level Switch Point | 0.20…11.40 in | 0.05 in |
| Level Hysteresis | 0.05…11.25 in | – |
| Window – Lower Value | 0.20…11.15 in | – |
| Window – Upper Value | 0.30…11.25 in | – |
| Offset | 0…45.6 in | – |
| Temp. Switch Point | –9…212 °F | 1 °F |
| Temp. Hysteresis | 2…222 °F | – |
Pin Assignment (M12×1, 8-pole)
| Pin | Function |
|---|---|
| 1 | +UB |
| 2 | SP2 |
| 3 | 0 V |
| 4 | SP1 |
| 5 | SP3 |
| 6 | SP4 |
| 7 | Analog level |
| 8 | Analog temperature |
Fluids
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Mineral & synthetic hydraulic oils, water-based fluids
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Others on request
Configuration & Extras
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Menu-driven key operation, programming lock
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SP outputs: hysteresis or window mode, NO/NC, assignable to level or temp.
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On/off delay: 0.00…9999 s
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Display modes: level, temperature, peak values, SP1–4, off
Main Applications
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Hydraulic tank level & temperature monitoring
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Overflow & pump dry-run protection
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Industrial automation & process control
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