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Series 10 · Subcategory 6

Four Level Extended Stem
Switch Sets

The maximum switching density in a single ERECTA SWITCH installation — four discrete liquid level setpoints from one tank penetration. Three mount styles, two housing configurations, three material options. Engineered for complex process logic where staged level control drives sequential equipment operation.

5 Models PP · Acetal · Kynar 3 Mount Styles 4 Switch Positions 1–70″ Nipple Lengths RoHS Compliant
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Level and Temperature Sensing — In One Assembly

ERECTA SWITCH Series 10 two, three, and four level extended stem sets can now be configured with one or more Series 11-800 bimetallic temperature switches substituted for any level switch position. Detect both critical liquid levels and temperature limits — freeze protection, overheat detection, or process limits — in a single tank penetration, from standard stock.

Material Configuration

Three Material Options — One Modular System

Every ERECTA SWITCH four-level set is available in Polypropylene, Acetal, or Kynar. The same modular configuration ships in all three. OEMs designing for multiple chemical environments often specify more than one.

PP — Polypropylene

General Chemical Service

The standard specification for aqueous and mildly aggressive environments

Handles the broadest range of industrial chemicals at the lowest cost. Resistant to acids, bases, bleach solutions, detergents, and most aqueous process fluids.

  • Wash cycle chemistry and detergent solutions
  • Cooling tower treatment chemicals
  • General process fluids and water systems
  • Food-grade cleaning solutions
AC — Acetal

Hydrocarbon & Solvent Service

For oils, fuels, and non-oxidizing environments where PP is insufficient

Superior dimensional stability and mechanical strength. Resistant to hydrocarbons, aliphatic solvents, oils, and fuels where fluid chemistry attacks polypropylene.

  • Hydraulic fluid and machine oil
  • Diesel fuel and petroleum distillates
  • Aliphatic solvent systems
  • Non-oxidizing process fluids
KR — Kynar (PVDF)

Aggressive Chemical & High-Purity Service

The specification when PP and Acetal fail

Handles strong oxidizers, halogenated solvents, concentrated acids, bromine, and semiconductor-grade process chemicals. Also correct for high-purity systems where material leaching is unacceptable.

  • Semiconductor wet bench chemistry
  • Chlorine, bromine, strong oxidizer service
  • Concentrated mineral acids
  • High-purity and ultra-pure process fluids

Material suffix appended to part number at time of order: 10-715-PP-12 (polypropylene, 12″) · 10-715-AC-12 (acetal) · 10-715-KR-12 (Kynar). Same ERECTA SWITCH set, same configuration — different material suffix. Contact us for chemical compatibility guidance on your specific fluid.

Browse Models

Four Level Switch Sets — All 5 Configurations

Organized by mount type, then housing style. Each set ships complete with four switches, connectors, spacers, and housing. Precision nipples (10-715) are required for each switch position and are sold separately.

Precision nipples (10-715) are required and sold separately. Each of the four switch positions requires one nipple to set the liquid level at actuation. The upper switch may mount directly to the receptacle without a nipple. Use the Nipple Length Calculator below before ordering.

Slosh shields are not available for four-level sets. The tight stem spacing required to fit four switch positions within the assembly geometry, combined with the outside-in installation requirement, makes slosh shield installation physically impractical. For agitated liquid applications requiring four-level control, consult Compac for application-specific guidance.

2″ NPT Adapter 2″ NPT Adapter Mount — 10-403, 10-406 Removable 10-700-AS adapter · Drums & 2″ bung tanks · Outside-in
Receptacle Housing Compact low-profile receptacle
10-403 Four Level Extended Stem Switch Set — 2 inch NPT Adapter Receptacle
10-403
2″ AdapterReceptacle

Four discrete level setpoints — full alarm, upper operating, lower operating, and empty shutoff — from a single 2″ NPT bung using the compact receptacle housing. The removable 10-700-AS adapter enables outside-in installation with no internal tank access. This is the maximum switching density available in a single ERECTA SWITCH bung-mount installation. Specify nipple lengths for all four positions at time of order.

  • Mount2″ NPT adapter (removable)
  • HousingReceptacle
  • MaterialPP / AC / KR
  • Switch Positions4
  • Nipple Range1–70″ · sold separately
  • Slosh ShieldsNot available
View 10-403 Details
Relay Housing FR ABS relay housing — integrated relay compartment at the 2″ bung
10-406 Four Level Switch Set — 2 inch NPT Adapter Relay Housing
10-406
2″ AdapterRelay Housing

Four-level monitoring for 2″ bung tanks with integrated relay control at the mount point. The FR ABS relay housing consolidates four switching points, relay logic, and conduit attachment into one outside-in bung-mount assembly. Choose the 10-406 when your four-level design requires on-board relay logic at the tank — the most capable self-contained level control assembly available for a 2″ NPT bung.

  • Mount2″ NPT adapter (removable)
  • HousingFR ABS Relay Housing
  • MaterialPP / AC / KR
  • Switch Positions4
  • Nipple Range1–70″ · sold separately
  • Slosh ShieldsNot available
View 10-406 Details
Flange Nut Flange Nut Mount — 10-404, 10-407 Smooth hole 1.65–2.3″ dia · Dual O-ring seal · Internal access required for bottom nut
Receptacle Housing Compact receptacle — minimal above-tank height at the flange
10-404 Four Level Switch Set — Flange Nut Receptacle
10-404
Flange NutReceptacle

Four-level monitoring through a smooth-cut hole in a flat tank wall or lid — no NPT port required — with the compact receptacle housing. Cut a 1.65–2.3″ hole; outer flange nut with dual O-ring seal clamps from outside, inner nut secures from inside. Four switch positions deliver full process logic from a single flat-wall penetration. Flange nuts in PP, Acetal, or Kynar to match your fluid chemistry.

  • MountFlange nut (2 nuts + 2 O-rings)
  • HousingReceptacle
  • Hole Size1.65–2.3″ dia.
  • Nut MaterialPP / AC / KR
  • Switch Positions4
  • AccessInternal req'd (bottom nut)
View 10-404 Details
Relay Housing FR ABS relay housing — integrated relay at the flange mount point
10-407 Four Level Switch Set — Flange Nut Relay Housing
10-407
Flange NutRelay Housing

Four-level flange-nut monitoring with the full FR ABS relay housing. The most complete flat-wall four-level assembly available — four switching points, relay compartment, and cam lock conduit base in one flange-mount unit. Cut a 1.65–2.3″ hole; outer flange nut seals from outside, inner nut locks from inside. Flange nuts in PP, Acetal, or Kynar. The correct specification for four-level flat-wall installations that require on-board relay logic.

  • MountFlange nut (2 nuts + 2 O-rings)
  • HousingFR ABS Relay Housing
  • Hole Size1.65–2.3″ dia.
  • Nut MaterialPP / AC / KR
  • Switch Positions4
  • AccessInternal req'd (bottom nut)
View 10-407 Details
Pop-In Pop-In Mount — 10-408 1-9/16″ hole · Thin-wall plastic only · Outside-in · No internal access
10-408 Four Level Switch Set — Pop-In Mount
10-408
Pop-InPop-In Receptacle

Four-level monitoring for thin-wall plastic tanks and lids — outside-in, no hardware, no internal access. The most switching density achievable from a single 1-9/16″ pop-in penetration. Snap the 10-702-R1 receptacle in from outside; the O-ring seals the wall for a liquid-tight installation. Wall must be plastic, 0.062–0.078″ thick. Four switch positions from one snap-in point is the highest integration efficiency in Series 10 for injection-molded enclosures and polyethylene reservoirs.

  • MountPop-in snap lock
  • HousingPop-In Receptacle (10-702-R1)
  • Hole Size1-9/16″ (39.67mm)
  • Wall Thickness0.062–0.078″ plastic only
  • Switch Positions4
  • Slosh ShieldsNot available
View 10-408 Details

Precision Nipple Length Calculator — Four Level Set

Each of the four switch positions requires one 10-715 precision nipple. The upper switch may mount directly to the receptacle without a nipple. Enter all four desired liquid levels and the calculator outputs correct part numbers for each position.

Nipple Specification — Four Level Set

Specifications

All Models — Quick Reference

All models ship as complete switch sets. Precision nipples (10-715) sold separately — specify length 1–70″ and material at time of order. No slosh shield variants available for four-level sets.

ModelMountHousingPort / HoleSwitch PositionsSlosh ShieldsAccessRoHS
10-4032″ AdapterReceptacle2″ NPT bung4Not availableOutside-in✓
10-4062″ AdapterRelay Housing2″ NPT bung4Not availableOutside-in✓
10-404Flange NutReceptacle1.65–2.3″ hole4Not availableInternal req'd✓
10-407Flange NutRelay Housing1.65–2.3″ hole4Not availableInternal req'd✓
10-408Pop-InPop-In Receptacle1-9/16″ hole4Not availableOutside-in✓
OEM Applications

Where Engineers Specify Four-Level Control

Four switching points from one installation — staged process logic that would otherwise require multiple sensors, multiple penetrations, and complex wiring. The ERECTA SWITCH four-level set consolidates it all.

Vertical 1

Commercial Laundry OEMs

Four-stage chemical tank management — overfill alarm, operating fill confirmation, refill trigger, and dry-run shutoff — in a single bung-mount installation on large laundry chemical reservoirs.

Reference: Ecolab-type systems
Vertical 2

HVAC / Chiller Manufacturers

Full four-stage coolant reservoir management — high overflow, upper operating band, lower operating band, and low-level pump shutoff — from a single chiller tank penetration.

Vertical 3

POU Water Purification / R.O.

Four-stage storage management on large-capacity R.O. and water vending systems — full stop, dispense enable, refill trigger, and low-level system shutoff.

Vertical 4

Semiconductor Wet Processing

Four-stage etch bath or rinse tank management. Kynar (PVDF) specified for HF, H₂SO₄, and high-purity DI water service. Maximum process logic density in a single tank penetration.

Vertical 5

Hydraulic Systems

Four-stage HPU reservoir control — overfill alarm, high operating band, low operating band, and emergency shutoff — for hydraulic systems requiring tight fluid level management.

Reference: Durable Controls HPU designs
Vertical 6

Chemical Injection Systems

Full four-stage reagent day tank management — overfill shutoff, normal operating band, reorder alert, and dry-run pump protection — in a single flange or bung installation.

Reference: Q-Lab test chamber fluid systems

Engineering Data & Drawings

Dimensional drawings, nipple length formulas, component part lists, and chemical compatibility data for all Series 10 Four Level Extended Stem models.

View Drawings Request Evaluation Sample
Series 10 Navigation

Other Series 10 Subcategories

Subcategory 1

Vertical Mounted Single Point
Subcategory 2

Side Mounted Level Switches
Subcategory 3

One Level Extended Stem
Subcategory 4

Two Level Extended Stem
Subcategory 5

Three Level Extended Stem
Subcategory 7

Combo Level/Temperature
Subcategory 8

5 Amp Float Level Switch Sets
Subcategory 9

Precision Nipples (10-715)
Frequently Asked Questions

Common Questions About This Product

What is the difference between a float level switch and a liquid level sensor?

A float level switch like the Series 10 level switch 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.

What factors should I consider when choosing the Series 10 level switch?

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.

What liquid chemistries is the Series 10 level switch compatible with?

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.

What mounting options are available for the Series 10 level switch?

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.

How is the actuation level set on the Series 10 level switch, and how accurate is it?

Point detection is repeatable and mechanical. The trip height on the Series 10 level switch 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.

What pressure and temperature can the Series 10 level switch handle?

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.

Can one Series 10 level switch switch control both a high and a low level?

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.

How do I wire the Series 10 level switch to a pump or alarm?

The Series 10 level switch 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.

Does the Series 10 level switch need calibration?

No. The Series 10 level switch 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.

How do I maintain the Series 10 level switch, and what if it stops working?

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.

Is the Series 10 level switch safe for flammable or hazardous-area liquids?

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.

What are the typical applications for the Series 10 level switch?

The Series 10 level switch 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.

What makes ERECTA SWITCH different from other switches?

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.