ERECTA SWITCH® by Compac Engineering
◆ Series 10 — Subcategory 2

Side Mounted Single Point
Level Switches & Sets

Horizontal mounting for applications where vertical tank access isn't available. Side-mounted switches install through the tank wall and detect a single liquid level at the mounting point. Ideal for horizontal tanks, drums, totes, and enclosures with limited headroom.

5
Configurations
Side
Mount Orientation
1–3
Materials per Model
100 PSI
Max Pressure
Side Mount Installation: Side-mounted switches detect level at the mounting point — the switch actuates when liquid rises to (or falls below) the height where the switch is installed through the tank wall. No extended stem or precision nipple required. The float pivots on a horizontal axis rather than traveling vertically on a stem.

Choose Your Configuration

Four models are Polypropylene only. The 10-788 is available in PP, AC, and KR for broader chemical compatibility.

◆ Technical Specifications

Specifications & Ratings

All side-mounted models use the 10-782 magnetic reed switch as the sensing element. Common ratings apply across all configurations.

Switch Type

SPST Magnetic Reed
KOFU ORD229 hermetically sealed

Electrical Rating

70VA / 50W
AC 0.5A / DC 0.7A · Max 300VAC / 350VDC

Pressure / Temperature

100 PSI / 90°C
Hollow float @ 20°C · Derate to 0 PSI @ 90°C

Specific Gravity

0.8 Minimum
Clear liquid required

PP — Polypropylene

Water, Soaps, Light Acids
Available on all 5 models

AC — Acetal

Hydrocarbons, Diesel, Oils
10-788 only

KR — PVDF Kynar

Harsh Chemicals, Acids, Caustics
10-788 only

Certifications

RoHS Compliant
UL component recognition (KOFU switch)

Model-by-Model Comparison

Model Mounting Connection Type Relay Housing Materials Key Feature
10-785 Side Mount Lead Wire PP Compact, basic side-mount switch
10-787 Side Mount Extended Lead Wire PP Longer lead for remote junction box
10-786 Side Mount Connector Terminal PP Quick-disconnect wiring terminal
10-786-R Side Mount Connector Terminal PP Relay housing for direct load switching
10-788 Side Mount Set (multiple options) PP, AC, KR Full set · 3 materials · broadest compatibility

All models: SPST magnetic reed switch (KOFU ORD229) · 70VA/50W · 100 PSI max @ 20°C · 90°C max · 0.8 SG min · Horizontal mount through tank wall · RoHS Compliant

◆ Application Examples

OEM Application Scenarios

Side-mounted switches solve problems where vertical access to the tank is blocked, the tank is horizontal, or you need point-level detection at a specific wall height.

🛢️

Horizontal Fuel Day Tank — Low Level Alarm

Acetal · Side Mount

A generator packager uses horizontal cylindrical day tanks where there's no vertical access through the top — the tank sits inside a steel skid frame with no room for a top-mounted switch. A side-mounted 10-788-AC installs through the tank end wall at the low-level alarm height. Acetal construction resists diesel fuel. The relay housing accepts an optional solid state relay to drive an alarm panel directly without a separate relay enclosure.

10-788-AC
⚗️

Chemical Drum Tote — Low Level Shutoff

PVDF Kynar · Side Mount

A chemical metering system OEM needs to detect when a bulk chemical tote is nearly empty so the metering pump shuts off before running dry. The tote has a flat side wall — a 10-788-KR mounts through a drilled hole near the bottom. PVDF Kynar handles the aggressive chemistry (sodium hypochlorite for water treatment). The pump-dry condition is the failure mode the customer is designing against — running a metering pump dry destroys the diaphragm.

10-788-KR
❄️

HVAC Condensate Pan — Overflow Prevention

Polypropylene · Side Mount

An air handler manufacturer needs overflow detection in their condensate drain pan. The pan has only 2–3 inches of vertical clearance below the evaporator coil — no room for a vertical float switch. A compact 10-785-PP mounts through the side wall of the pan and detects when water reaches the alarm level. The switch signals the building management system to shut down the blower and trigger a maintenance alert. Polypropylene handles condensate water chemistry.

10-785-PP
🔧

CNC Coolant Reservoir — Low Level Shutoff

Polypropylene · Side Mount

A machine tool builder needs coolant level detection in their CNC mill's coolant sump. The sump sits under the machine bed with no vertical access — a side-mount switch installs through the sump wall. The 10-786-R with relay housing lets the customer mount a solid state relay that directly controls the coolant pump, shutting it off before the sump runs dry. The connector terminal allows quick disconnect during machine service without cutting wires.

10-786-R-PP 10-786-PP
🍽️

Commercial Warewash — Chemical Supply Tank

Polypropylene · Side Mount

A commercial dishwasher OEM needs to detect when the rinse aid supply tank is low so the machine displays a refill alert. The tank is a small polypropylene reservoir mounted inside the machine cabinet with only side access. A 10-787-PP with extended lead wire runs the signal back to the control board mounted elsewhere in the cabinet. No relay housing needed — the control board handles the logic. The extended lead eliminates a splice inside the machine.

10-787-PP
🏭

Acid Neutralization System — High Level Alarm

PVDF Kynar · Side Mount

A water treatment system integrator needs a high-level alarm on an acid neutralization tank to prevent overflow. The tank already has vertical-mount level switches controlling the fill and drain pumps — the side-mounted 10-788-KR provides an independent backup alarm at the high-water mark. Mounting through the side wall at the alarm height gives a physically independent detection point. PVDF Kynar construction handles the low-pH effluent entering the neutralization system.

10-788-KR
◆ Technical Resources

Series 10 Technical Documents

Download detailed technical literature for the Series 10 product family. All side-mounted switches use the 10-782 as their primary switching element.

Need Help Selecting a Side-Mount Switch?

Tell us your tank orientation, liquid chemistry, and detection height — we'll recommend the right configuration for your application.