✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
Description
Compact UL-Listed Simplex Pump Control Panel for Single-Phase Residential Sewage, Septic, and Water Transfer Applications
When a single residential pump needs reliable on/off control with high-water alarm protection, the SJE NEX Series simplex pump control panel handles it. The compact 8" x 6" x 4" NEMA 4X panel manages one 120/208/240V single-phase pump using float switches and triggers an audible/visual alarm at high level.
Quick Specs
- Application: Simplex (single pump) control
- Voltage: 120 / 208 / 240V single phase, 50/60 Hz
- Amperage: 0–12 amps (also available in 9–20 amps)
- Float Control Voltage: 12 VDC
- Alarm Horn: 85–90 dB
- Certification: UL / cUL Listed (UL 508A)
- Warranty: 5-Year Limited
Key Features of the SJE NEX Series Simplex Pump Control Panel
- Universal 120/208/240V single-phase compatibility lets one panel cover three voltage configurations without separate SKUs.
- NEMA 4X UV-stabilized thermoplastic enclosure withstands moisture, dust, corrosion, and outdoor sun exposure for indoor or outdoor mounting.
- Hand-Off-Auto (HOA) switch supports manual pump test and bypass when troubleshooting float behavior or running a forced pump-down.
- Standard alarm package includes a red 360° beacon, 85–90 dB horn, and exterior test/silence push button alarm auto-resets after the high-level condition clears.
- Auxiliary alarm contacts (Form C, 5A at 120 VAC max) signal external monitoring devices for remote notification on this simplex pump control panel.
- Padlockable latch and integral mounting feet keep installation fast and the enclosure secured against tampering in unattended residential installs.
- Pump run indicator and float status indicator lights give at-a-glance visibility into operating state without opening the enclosure.
Specifications
| Specification | Details |
|---|---|
| Brand | SJE Rhombus |
| Series | NEX Series® |
| Application | Simplex — controls one single-phase pump |
| Pump Voltage | 120 / 208 / 240V single phase, 50/60 Hz |
| Control / Alarm Voltage | 120 / 208 / 240V single phase, 50/60 Hz |
| Pump Amperage | 0–12 amps or 9–20 amps (model-dependent) |
| Float Control Voltage | 12 VDC |
| Float Switches | Compatible with three (3) normally open SJE SignalMaster® control switches (stop, start, alarm), sold with floats or panel-only |
| Enclosure Dimensions | 8" x 6" x 4" (20.32 x 15.24 x 10.16 cm) |
| Enclosure Type | Padlockable NEMA 4X, UV-stabilized thermoplastic with integral mounting feet |
| Mounting | Indoor or outdoor |
| Alarm Beacon | Red LED, 360° visual indication |
| Alarm Horn | 85–90 dB |
| Alarm Reset | Automatic after high-level condition clears |
| Auxiliary Alarm Contacts | Form C, 5 amp, 120 VAC maximum |
| HOA Switch | Hand-Off-Auto for manual pump control |
| Indicator Lights | Green pump run light, control/alarm power indicator, float status (stop/start) lights |
| Circuit Protection | Pump branch circuit breaker plus separate control/alarm fuses |
| Power Relay Life | Minimum 5,000,000 mechanical cycles / 100,000 electrical cycles |
| Certification | UL / cUL Listed to UL 508A |
| Ship Weight | 2.27 kg (panel only) / 4.08 kg (with floats) |
Performance Overview
The NEX simplex pump control panel runs a three-float sequence: stop, start, alarm, switch pump power on demand, and trigger visual and audible alerts at high level.
Construction & Internal Components
| Component | Details |
|---|---|
| Enclosure | UV-stabilized thermoplastic, NEMA 4X-rated, hinged door with neoprene gasket |
| Mounting | Integral mounting feet; padlockable latch |
| Pump Circuit Protection | Thermal magnetic circuit breaker sized to the NEC interrupt and amp rating |
| Power Relay | Switches pump power; rated for pump horsepower |
| Control Logic | Printed circuit board (PCB) eliminates conventional wiring inside the controller |
| Control / Alarm Protection | Separately fused control and alarm circuits |
| HOA Switch | PCB-mounted Hand-Off-Auto selector for manual or automatic operation |
| Indicators | Green pump run light, green control/alarm power indicator, red float status lights (stop/start), red alarm beacon |
| Alarm System | LED beacon (360°), 85–90 dB horn, exterior test/silence push button, Form C auxiliary contacts |
| Field Wiring | Terminal block; ground lug provided |
| Optional | Elapsed Time Meter (ETM) variants available |
Applications
- Residential septic systems with single submersible effluent pumps
- Residential and light-commercial sewage ejector pump installations
- Single-pump lift stations in low-flow service areas
- Sump and dewatering pump control where a high-water alarm is required by code or AHJ
- Water transfer and graywater pumping in residential properties
- Replacement controller for failed direct-wire single-pump installs needing alarm separation
Why Choose the SJE NEX Series Simplex Pump Control Panel?
The NEX Series simplex pump control panel keeps a single residential pump running on a separate circuit from its high-water alarm, the layout most installers and inspectors expect on septic and sewage systems.
Buy SJE NEX Series Simplex Pump Control Panels Online from Cleanflow
As a trusted distributor of SJE Rhombus products, Cleanflow stocks the SJE NEX Series simplex pump control panel in both panel-only and floats-included configurations. We ship across Canada and the USA, and our technical staff are available to help you confirm the correct amperage range, float configuration, sizing, and wiring for your installation.
Add to cart today or contact the Cleanflow team with any questions.
What does a simplex pump control panel do?
A simplex panel controls one pump. It uses float switches to start and stop the pump based on liquid level, runs the alarm circuit on a separate breaker, and triggers an audible and visual alert if water reaches the high-level float.
What voltages does the NEX Series panel support?
It handles 120V, 208V, and 240V single-phase power on the same panel. No need to spec a separate model per voltage. Both pump power and control/alarm power use the same 120/208/240V single-phase, 50/60 Hz feed.
Can the panel be installed outdoors?
Yes. The NEMA 4X UV-stabilized thermoplastic enclosure is rated for indoor or outdoor mounting and resists corrosion, windblown dust, rain, and hose-directed water. Use proper conduit sealing to keep gas and moisture out of the enclosure.
What is the HOA switch, and when do I use it?
HOA stands for Hand-Off-Auto. Hand runs the pump manually for testing or pump-down. Off disables the pump (alarm stays active). Auto returns to normal float-controlled operation. Use Hand to test pump function during commissioning or troubleshooting.
Does the panel come with float switches?
Two configurations: panel-only (Cleanflow part 1047662 / 1047663) for installers using existing or third-party floats, or with three SJE SignalMaster control switches on 20-foot leads (1046436 / 1046437). Confirm float type before ordering.
Is this panel rated for commercial or industrial use?
The NEX Series is built for residential and light-duty applications. For commercial lift stations, larger pump amperage, or duplex (two-pump alternating) configurations, look at the SJE NEX Series Duplex panel or step up to a larger SJE Rhombus controller.
How loud is the alarm horn?
The integrated horn is rated 85–90 dB at the unit. The 360° red LED beacon provides a visual indication. The exterior test/silence push button lets the operator silence the horn during the high-level event. The alarm auto-resets when the level drops.
What is the warranty?
SJE Rhombus backs the NEX Series simplex panel with a 5-Year Limited Warranty. Warranty is void if the panel is modified. Installation must follow the included instructions and applicable electrical codes (NFPA-70, provincial, and local).
Manuals & Documentation
✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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