Two-level 1-1/4" NPT switch set with H2 relay housing for on-board relay mounting. Polypropylene handles water, water-based coolants, soaps, detergents, and dilute acid/alkaline solutions.
| Quantity | Price |
|---|---|
| 1–29 | $164.29 |
| 30–49 | $144.44 |
| 50–99 | $127.58 |
| 100+ | $59.48 |
The 10-205 combines two-level monitoring with on-board relay integration on a 1-1/4" NPT port. Where an application requires not just two level set points but a relay or control module mounted directly at the sensor — eliminating long wiring runs to a remote panel — the 10-205 delivers both in a single outside-in assembly.
The 10-701-H2 Relay Housing is the two-level version of the standard relay housing, standing 4.9" (124.46 mm) above the tank mount and providing enclosed volume for relay mounting, terminal blocks, or signal conditioning electronics for two independent switch circuits. The 10-700-S2 spacer braces the dual-switch stalk assembly between the two 10-782 switches on the precision nipple, maintaining rigidity and positional accuracy at both level set points.
Installation is outside-in on the 1-1/4" NPT port. No internal tank access required. The relay housing manages wiring entry directly for both switch circuits.
Polypropylene handles water-based, mild chemical, and detergent-compatible applications.
Precision nipple (10-715) ordered separately in 1" increments from 1" to 70". NL = LL − 2.20" (55.9 mm). BD = 1.5" (38.10 mm) minimum between switch levels.
| Specification | Value |
|---|---|
| Mount | 1-1/4″ NPT |
| Housing | 10-701-H2 Relay Housing (4.9″ / 124.46 mm) |
| Install | Outside → In (no internal access required) |
| Switch Levels | 2 |
| Switch Element | 10-782 magnetic reed switch |
| Contact Action | Field-reversible NO/NC per float — legend down = close on rise (NC, shipped default), legend up = open on rise (NO). Changed in the field with needle-nose pliers. |
| Contact Rating | 70 VA, 50W resistive | UL File E70063 |
| Inductive Loads | Require external arc suppression — solenoid and relay coils. Above the rating, isolate the load with a Series 50 relay. |
| NL Formula | NL = LL − 2.20″ (55.9 mm) |
| BD (min) | 1.5″ (38.10 mm) |
| CD (min) | 3.0″ (76.2 mm) |
| Nipple Range | 1–70 in, ordered separately (10-715) |
| Compliance | RoHS |
| Material | Polypropylene |
| Pressure Rating | 100 PSI @ 20°C; derate to zero @ 90°C |
| Max Temperature | PP: 180°F / AC: 200°F / KR: 280°F |
A float level switch like the 10-205-PP 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.
Consider media chemistry (pick PP, AC, or KR), liquid specific gravity, operating temperature and pressure, mounting style, number of switch points, and electrical contact rating. Compac will spec it from your application — request a free evaluation sample.
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. Most ERECTA SWITCH models are offered in all three materials; some are material-specific, so check the product page for the model you need.
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 10-205-PP 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.
It depends on the series, and the derate matters more than the headline. Series 10 is rated 100 PSI, Series 15 50 PSI and Series 20 20 PSI — each at 20°C, each derating to zero at 90°C, so a hot line has no pressure allowance left. Series 20 sits lowest by design: its float sections are thin-walled, and sustained pressure can crush them. Temperature follows the material — on Series 10, PP: 180°F, AC: 200°F, KR: 280°F.
A single switch detects one point. For high-plus-low detection (or more), use a multi-level extended-stem set that places multiple reed points on one stem, giving you independent high and low signals from a single mounting hole.
The 10-205-PP uses a magnetic reed switch wired in series with your relay or controller. Contact rating is 70 VA / 50 W resistive (UL File E70063). The switch ships with lead wires — connect directly to your control circuit.
No. The 10-205-PP is a mechanical float actuating a sealed reed switch — there is nothing to calibrate or power. This is a reliability advantage over electronic sensors that can drift over time.
Inspect that the float moves freely (check for debris or scaling), then test reed continuity with a multimeter. Because ERECTA SWITCH is modular, you replace only the individual component — switch, float, connector, or fitting — instead of the whole assembly.
Standard ERECTA SWITCH models are not rated for hazardous (Class I / Div) areas. For flammable-service applications, contact Compac engineering to discuss your requirements and available options.
The 10-205-PP 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.
It is the only fully modular, off-the-shelf liquid level switch system: switch, float, connector, fitting, and nipple are independently field-replaceable and stocked. OEMs configure exactly what they need with no minimums and short lead times. Made in Paradise, California; RoHS compliant.
Our engineering team can verify compatibility with your application and chemistry before you order.