LPIL-8-MP-IM Impulse Low Profile In-Line 8 Pin Male Plug
Keywords： low profile underwater connector, LPIL-8-MP-IM, LP series submersible connector, 8 pin low profile connector, AUV connector, glider underwater connector, low drag subsea connector, Impulse compatible LP connector, LPMBH LPIL connector, 600 bar low profile
- IP68 waterproof
- Up to 7000m
- In-line, 1Pin, Male
- RV POWER GROUP
- [email protected]
-
- Description
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The LPIL-8-MP-IM is an Impulse-Compatible Low Profile Micro In-Line Connector, 8-pin Male (pin contacts), rated to 690 Bar (7,000 m (mated) / 10,000 psi) mated. The Impulse LP Micro series is dimensionally compatible with Teledyne Impulse LPMBH and LPIL connector hardware — providing a direct drop-in field replacement with full performance equivalence. Designed for compact oceanographic instruments, AUV sensor payloads, and subsea cameras where the standard LP connector body would be too large. 250 V DC/AC rms rated, 5 A per contact, with a low-drag flat profile body that minimises hydrodynamic resistance on AUV and glider hulls. Inline cable plug for direct cable-to-cable or cable-to-sensor connections along umbilicals and pigtails. The LP series is the preferred connector for science-grade instruments where size, weight, and drag constraints prevent the use of standard 55-series or Micro Circular connectors.
At a glance: 8 pins | Male | 250 V DC/AC rms | 5 A per contact | Mated 690 Bar (10,000 psi) | Open-face 480 Bar (7,000 psi) | Wet matings >500 | Low-profile, low-drag body
Key Design Features
- Low-Profile, Low-Drag Body: Flat connector profile presents minimal cross-section to water flow — significantly reduces drag on AUV hulls, glider fairings, and ROV sensor racks versus standard circular connector bodies.
- 8-Pin Male Configuration: Pin contacts for multi-sensor and data-logger integration requiring high pin density in a compact body.
- 690 Bar Mated Pressure (7,000 m (mated)): The 690 Bar / 10,000 psi mated rating exceeds the standard LP series, covering all work-class ROV and deep-science vehicle operating depths.
- 480 Bar Open-Face Rating: Can be lowered unmated to approximately 7,000 m without damage — suitable for staged deployment profiles.
- 250 V DC/AC rms / 5 A per contact: Handles power and signal circuits simultaneously; suitable for sensor power supply (5–24 V DC) and RS-232/RS-485/Ethernet signal circuits.
- Gold-Plated Contacts: Contact resistance <0.01 Ω; insulation resistance >200 MΩ; corrosion-immune over the full operating life.
- Chloroprene Rubber Body: Flexible, chemically resistant body suited for repeated dynamic bending in instrument cables and pigtails.
- >500 Wet-Mate Cycles: Wiper seals protect contacts during each mating cycle; suitable for frequent laboratory and field disconnect/reconnect cycles on shared instrument platforms.
- Impulse LPMBH/LPIL Dimensional Compatibility: Drop-in replacement for Teledyne Impulse LPMBH/LPIL hardware — no adapters required.
- POM or SS Locking Sleeve (Mandatory): Always install the locking sleeve before deployment to prevent accidental de-mating in dynamic service.
Electrical & Mechanical Specifications
| Parameter | Value |
|---|---|
| Model number | LPIL-8-MP-IM |
| Series | Impulse Low Profile Micro Series |
| Configuration | In-Line (IL) — Male |
| Number of contacts / pins | 8 |
| Voltage rating | 250 V DC/AC rms |
| Current per contact | 5 A per contact |
| Maximum total current | 40 A |
| Insulation resistance | >200 MΩ |
| Contact resistance | <0.01 Ω |
| Mated pressure rating | 690 Bar (10,000 psi) |
| Open-face pressure rating | 480 Bar (7,000 psi) |
| Rated depth (mated) | 7,000 m (mated) |
| Wet-mate cycles | >500 |
| Temperature (water) | −4°C to +60°C |
| Temperature (air) | −40°C to +60°C |
| Body design | Low-profile flat body — minimum drag |
| Body material | Chloroprene rubber |
| Shell material | 316 Stainless Steel (Titanium on request) |
| Contacts | Gold-plated beryllium copper / brass |
| Locking sleeve | POM or Stainless Steel (mandatory before deployment) |
| O-ring seals | Nitrile |
| Cable jacket | Polyurethane (PUR) — customer-specified OD |
Typical Applications
- Autonomous Underwater Vehicle (AUV) sensor and payload connector — minimal drag on hull fairings
- Underwater glider and profiling float instrument connections
- Compact oceanographic instrument packages — CTD, dissolved oxygen, fluorometer sensors
- ROV-mounted instrument sensor connections where standard 55-series connectors would foul on the ROV frame
- Subsea camera and lighting connector on compact inspection ROVs
- Deep-sea lander and benthic observatory instrument connections
- Acoustic modem and hydrophone array cable connectors
- Diver instrumentation and scuba data logger connections
- Subsea environmental monitoring sensors — oil spill detectors, methane sensors, turbidity meters
Why Choose the LPIL-8-MP-IM?
Low-Profile Design for Drag-Sensitive Platforms
On AUVs, gliders, and profiling floats, connector drag directly reduces endurance and range. The LP series presents 40–60% less frontal area versus standard circular connectors of equivalent pin count — measurably improving vehicle performance on long-duration deployments.
Impulse Dimensional Compatibility for Easy Replacement
The LPIL-8-MP-IM is a direct dimensional equivalent of Teledyne Impulse LPMBH/LPIL hardware — the industry-standard LP connector in oceanographic research. Field replacement requires no re-wiring, no adapters, and no system redesign.
690 Bar / 10,000 psi — Widest Depth Coverage in the LP Range
Rated to 690 Bar (10,000 psi), the LPIL-8-MP-IM covers all work-class ROV depths and the deepest AUV profiles. Every unit is pressure-tested to the rated depth before shipment.
Compact Science Instrument Integration
The low-profile body enables connector installation in tight instrument clusters on CTD rosettes, lander frames, and benthic crawlers where standard connectors would conflict with adjacent sensors, structural members, or electronic housings. The flat profile also reduces the risk of entanglement with mooring lines and biofouling structures.
Complete Family Supply
RV Power Group supplies the full LP range (BH, IL, DC in 2/4/5/7/9 pin, M and F) from a single source — matched sets, factory-terminated assemblies, and locking sleeves. Contact [email protected] for project quotations.
Complete Low Profile Connector Range
How to Select Your Low Profile Connector
| Criterion | Guidance |
|---|---|
| Pin count | 2 pin: single-phase power or 2-wire data; 4 pin: RS-232 + power; 5 pin: extended signal; 7 pin: multi-channel sensor; 9 pin: maximum LP density |
| Connector type | BH: bulkhead/panel mount; IL: inline cable-to-cable; DC: dummy/protective cap for unmated faces |
| Gender | M (male pins) on cable/field side — F (female sockets) on fixed/instrument side. Standard practice: male contacts on the energised side for safety |
| Series | Standard LP: 600 Bar / 6,000 m — sufficient for most science instruments; Impulse (LPMBH/LPIL-IM): 690 Bar / 7,000 m — required for Teledyne Impulse compatibility or deepest profiles |
| Dummy connectors | Always order one DC for every unmated BH or IL — mandatory for preserving connector integrity during storage and transit |
| Locking sleeves | POM standard; SS for abrasion-heavy ROV environments. Always install before deployment |
Frequently Asked Questions
Q: What is the rated depth for the LPIL-8-MP-IM?
A: Mated pressure rating is 690 Bar (10,000 psi) (7,000 m (mated) equivalent depth). Open-face rating is 480 Bar (7,000 psi).
Q: How does the LP series differ from the Micro Circular series?
A: The LP (Low Profile) series has a flat, rectangular body profile that minimises hydrodynamic drag on AUV hulls and glider fairings. The Micro Circular series is cylindrical and rated to higher pressures (1,400 Bar mated). Choose LP for drag-sensitive platforms; choose Micro Circular for deepest-rated or highest-density applications.
Q: Is the Impulse LPMBH/LPIL-IM a direct drop-in for Teledyne Impulse hardware?
A: Yes — the LPMBH/LPIL-IM is dimensionally compatible with Teledyne Impulse LP connector hardware. Verify mating thread and contact gender before installation.
Q: What voltage and current does the LPIL-8-MP-IM support?
A: 250 V DC/AC rms, 5 A per contact (40 A total connector current).
Q: How many wet-mate cycles is the connector rated for?
A: >500 wet-mate cycles. Inspect contacts and O-rings every 50 cycles or annually for oceanographic deployments.
Q: Is a locking sleeve required?
A: Yes — always install the POM or SS locking sleeve before deployment. Never deploy without it, even on short shallow dives.
Q: Do you supply matched BH + IL + DC sets?
A: Yes — matched LP sets (BH + IL + DC, specified pin count and gender) are available as a complete package. Contact [email protected].
Q: What cable OD can be accommodated?
A: Standard strain relief boots cover cable OD ranges from approximately 4 mm to 12 mm depending on pin count. Specify your cable OD when ordering factory-terminated assemblies for the correct boot size.
Q: Are pressure test certificates available?
A: Yes — batch or per-unit hydrostatic pressure test certificates are available on request. Contact [email protected].
Q: Are titanium hardware options available?
A: Yes — titanium coupling nut and shell hardware is available on request for weight-sensitive AUV and glider applications where buoyancy budget is critical.
Installation, Mating & Maintenance Guidelines
Pre-Deployment Inspection
(1) Inspect all contacts for corrosion, bending, or debris — clean with a dry lint-free cloth. (2) Check O-rings for cuts or permanent set — replace immediately if any damage found. (3) Apply a thin film of silicone grease to O-ring surfaces only — do not apply to contact faces. (4) Verify locking sleeve slides freely on coupling nut. (5) Remove protective caps or dummy connectors immediately before mating — do not leave contacts exposed to ambient air for more than 60 seconds offshore. (6) Confirm the locking sleeve is available and will be installed immediately after mating.
Mating Procedure
(1) Align the key/guide feature and insert the plug into the socket with a single smooth linear stroke — do not rotate the connector body during insertion. (2) Thread coupling nut clockwise until finger-tight. (3) Slide locking sleeve forward over coupling nut until the snap-lock engages (audible click or positive tactile stop). (4) Verify engagement by attempting to pull the locking sleeve rearward — it must not move. (5) On instrument systems, conduct a pre-dive electrical continuity and insulation resistance check (≥200 MΩ at 250 V) before deployment.
Storage & Maintenance
Rinse with fresh water immediately after seawater exposure — salt crystallisation on the chloroprene body accelerates degradation. Store with dummy connectors installed; remove locking sleeves during storage to avoid permanent deformation of the snap-lock mechanism. Inspect annually — replace body if chloroprene shows cracks or surface hardening. Replace O-rings every 2–3 years. Log all mating cycles and inspection dates for programme traceability.
For pricing, matched sets, factory-terminated cable assemblies, and technical support for the LPIL-8-MP-IM and the complete LP connector range, contact [email protected]. Our subsea engineering team responds within one business day.