Single-point heavy-duty liquid level switch. Yaskawa Bestact™ inductive switching element. 1/4 NPT bulkhead mount. 120 VA / 240 VAC. Class 1 Div 2. Polypropylene handles water, water-based coolants, soaps, detergents, and dilute acid/alkaline solutions.
| Quantity | Price |
|---|---|
| 1–9 | $148.93 |
| 10–24 | $126.04 |
| 25–49 | $99.29 |
| 50–99 | $78.29 |
| 100+ | $68.72 |
The 20-611-WO-PP is the wet open (WO) variant: the switch opens on a rising liquid level as the float approaches the hex, and closes as the float approaches the stop ring. Polypropylene construction handles industrial wash-down water, aqueous process solutions, soap and detergent systems, potable water storage, and similar water-based applications. The Bestact™ element delivers 100,000 operations at full 240 VAC rated load.
| Specification | Value |
|---|---|
| Switch Element | Yaskawa Bestact™ hermetically sealed |
| Contact Rating | 120 VA at 240 VAC Inductive |
| Contact Life | 100,000 ops at AC rating; 300,000 ops at DC rating |
| Mount | 1/4 NPT, jam nut, bulkhead seal O-ring |
| Float Diameter | 2.0 in (50.9 mm) |
| Overall Length | 3.8 in (96.52 mm) |
| Pressure | 20 PSI @ 20°C; derate to zero @ 90°C |
| Temperature Max | 90°C |
| Approvals | Class 1 Div 2, Groups A, B, C, D |
| Compliance | RoHS |
| Material | Polypropylene |
A float level switch like the 20-611 is a point-level device: a float rides the liquid and actuates a magnetic reed switch at a set height, giving a simple on/off signal — no power, no firmware, no calibration. "Sensors" usually means continuous measurement (ultrasonic, radar, capacitive). ERECTA SWITCH targets reliable discrete-point control.
The 20-611 is used for pump start/stop control, high-level overflow protection, low-level dry-run protection, and tank or reservoir level alarms in OEM equipment. The modular ERECTA SWITCH system is built into laundry, HVAC, water-treatment, hydraulic, and chemical-handling machinery.
Choose the material to match the media: Polypropylene (PP) for general aqueous, acids, and bases; Acetal (AC/Delrin) for solvents, fuels, and hydrocarbons; Kynar PVDF (KR) for aggressive or harsh chemicals. Every ERECTA SWITCH model is offered in all three materials.
The 20-611 is point-level — it provides a discrete on/off signal at a set height. For multiple switch points, use a multi-level extended-stem set (2-, 3-, or 4-level) instead of a single continuous sensor.
ERECTA SWITCH offers vertical top-mount, bulkhead, and extended-stem configurations, plus side-mounted single-point models. The mount style is part of the model number — select the configuration that matches your tank geometry.
Point detection is repeatable and mechanical. The trip height on the 20-611 is set by the 10-715 Precision Nipple, ordered separately in 1-inch increments (1″–70″), so you place the switch point exactly where the application needs it.
Our engineering team can verify compatibility with your application and chemistry before you order.