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In-Place Inclinometer

7×24 automated deep-displacement monitoring. One RS485 cable chains up to 128 sensors, and a 120 g/m carbon-fiber rod lets a single operator install by hand — even in 60–100 m boreholes.

SCIS-IPI-01 · RS485 ×128 · CARBON FIBER

SCIS-IPI-01 lightweight in-place inclinometer sensor string with carbon-fiber rods and RS485 bus cabling

Overview

Real-time data that manual surveys can never capture

If the sliding inclinometer solves manual-survey efficiency, the in-place inclinometer answers the need for 7×24 automated monitoring. It samples continuously at minute-level frequency — as fast as one reading per minute — capturing the instantaneous changes a daily site visit could never detect.

✓
Carbon-fiber rod, 120 g/m
One-fifth the weight of a traditional metal rod — light yet high-strength (≥5.5 kN).
✓
One RS485 cable, 128 nodes, AutoID
A single bus chains 128 segments; AutoID auto-addressing means no per-unit configuration.
✓
Electrolytic-solution sensor option
Proprietary sensing element with 1×10⁻⁸-level long-term stability for multi-year projects.

0.005 mm

Resolution / 500 mm

×128

Sensors on One RS485 Bus

120 g/m

Carbon-Fiber Rod

IP68 · 2 MPa

Waterproof Rating

How it works

A Permanent Sensor String Inside the Casing

If the sliding inclinometer is a stethoscope lowered into the borehole for each visit, the in-place inclinometer is a permanently implanted ECG: it seals the entire manual-survey process inside the grooved casing and runs it automatically, around the clock.

System composition: sensor segments, connecting rods, steel wire rope, casing-mouth protector and the data-service system (controller + power + collector box). Numbering runs bottom-up — segment #1 sits deepest.

✓
Permanent, not periodic
A sliding system competes on flexibility — one probe surveys many boreholes weekly or monthly during construction. The in-place type competes on permanence: installed once, it samples automatically at minute-level frequency with no site visits. Projects running three years or longer, or sites needing remote access, are IPI territory; sub-one-year construction monitoring usually favors the sliding type.
✓
Segment number ↔ depth, on record
Segments are installed bottom-up, and each one is logged into a segment-number-to-depth table as it goes in. Any later anomaly in the remote data maps straight back to a specific segment at a specific depth — so maintenance targets one node instead of guessing.
✓
Cloud-managed alarms, automatically
Devices are bound to the cloud platform at the factory; on site, the controller registers and comes online by itself. Engineers then set rate and cumulative alarm thresholds per measuring point — when a reading exceeds them, the platform pushes SMS alerts, with multi-account views for owner, contractor, supervisor and third parties.

What the Data Looks Like

Each segment continuously measures tilt over its gauge length; the platform converts the chain of readings into a displacement-vs-depth profile. Because sampling is automatic — as fast as one reading per minute — the profile is redrawn continuously, revealing how deflection develops over time instead of waiting for the next manual survey.

On network loss, each string buffers data in 16 GB of onboard storage — over a year of history — and resumes upload automatically once the connection recovers.

Representative continuous-monitoring profile shape: successive automated readings reveal progressive deflection with depth. Illustrative curve shape only — not project data.

Specifications

Built for Unattended, Long-Term Duty

Two figures stand out: 0.05 W per segment means the system runs stably on solar power alone, and 5.5 kN tensile strength keeps deep-borehole installation structurally safe.

Parameter	SCIS-IPI-01 Specification
Sensor	MEMS accelerometer / electrolytic-solution sensor (optional)
Range	±15° / ±30°
Resolution	0.01 mm / 0.005 mm
Repeatability	±0.003°
Long-term stability	<±0.01%
Operating temperature	-20 ~ 70 ℃
Waterproof rating	IP68 / 2 MPa
Power consumption	≤0.05 W / segment
Tensile strength	≥5.5 kN
Rod length	0.79 m / 1 m
Net weight	~1 kg / segment

Structure & core advantages

"Light yet Strong" — the Design Philosophy

While holding 5.5 kN tensile strength, the carbon-fiber rod cuts weight to one-fifth of a traditional metal rod — so operators install in 60–100 m deep boreholes by hand, with no hoisting equipment.

1
Centralizing wheel set
Fixed wheels plus spring-loaded wheels keep the sensor precisely aligned in the casing.
2
Rod — carbon fiber / aluminum alloy
120 g/m, one-fifth the weight of a traditional metal rod, with deep anodized corrosion protection.
3
High-precision tilt sensor
The core measuring element: MEMS, or the proprietary electrolytic-solution sensor for ultimate long-term stability.
4
Universal joint connection
Flexibly links the segments to accommodate a degree of casing bend.
5
Positioning cable + casing-mouth fixture
Anchors and protects the entire sensor string.

Schematic showing chained in-place inclinometer segments inside deformed inclinometer casing

Bus Connection

One RS485 cable chains 128 segments. Each sensor ships with a factory-unique long address; AutoID assigns short addresses on site — plug-and-play, no per-unit configuration.

Smart Automation

Scheduled sampling configurable from 1 min to 24 h; ultra-low-power sleep mode; breakpoint-resume on network loss with 16 GB local storage; remote configuration and firmware upgrades.

Long-Term Stability

Even the best MEMS accelerometers drift at the 1×10⁻⁵ level over the years; SoilCreate's proprietary electrolytic-solution sensor holds 1×10⁻⁸ — three orders of magnitude less drift, ideal for 5-year-plus monitoring.

In-place + sliding, better together: the in-place type captures instantaneous changes in real time (such as tidal fluctuations); the sliding type cancels zero drift with forward-and-reverse runs. Combined, they form the most complete deep-displacement monitoring solution.

Installation

Installation: 12 Steps, Bottom-Up

Before starting: identify the string's top (the segment with the aviation-plug cable) and bottom (no plug), and clamp the steel wire rope to the bottom segment. Three checkpoints gate the whole procedure — fixed-wheel orientation, connecting-rod engagement, and steel-wire-rope lock-off.

1
Compress the spring-loaded wheels
Press the moving-wheel springs on the segment firmly before it enters the casing.
2
Slide the wheel set into the guide grooves — checkpoint
The fixed wheels must face the expected deformation direction of the excavation. Wrong orientation distorts all subsequent data.
3
Mate the connecting rod — checkpoint
Carefully insert the quick-connect port of the rod above the segment onto the metal connecting rod — fully seated, no gap. Any gap is an error source.
4
Tension and lock the steel wire rope — checkpoint
Pull the wire rope through the rod fully taut, then lock the segment's rope clamp. An untensioned rope leaves segments unloaded and lets them drop out of position.
5
Secure the spare cable
Wind excess cable around the connecting rod and fasten with cable clips, so it cannot rub against the casing wall.
6
Lower and connect the next segment
Push the rod down, then insert the next segment's bottom metal rod into the quick-connect port — again with no gap.

7
Repeat for every segment
Repeat steps 1–5 segment by segment, bottom-up, until the string is complete.
8
Lead out the top cable
Bring the top segment's cable and aviation plug out through the side slot of the casing-mouth protector.
9
Seat the casing-mouth protector
Place the protector into the casing with its rim pressed onto the casing mouth.
10
Tension the top wire, tighten the screws
Pull the wire rope above the protector until fully fixed, then tighten the butterfly screws on the protector.
11
Stability check before power
Visually confirm the whole system sits firmly in the casing before energizing anything.
12
Power up and go online
Connect power and the controller, then bring the string online on the cloud platform — and verify the first remote reading before leaving site.

The Three Gates

1 · Fixed-wheel orientation

The fixed wheels must face the excavation's expected deformation direction. Installed the wrong way, readings persistently trend to one side — and the only remedy is re-installing with the correct orientation.

2 · Connecting-rod engagement

Every metal connecting rod must be fully seated in its quick-connect port with no gap. A loose segment-to-segment joint is a permanent error source.

3 · Steel-wire-rope lock-off

Tension first, then lock the rope clamp. If the rope will not pull through, the previous segment's clamp is still locked — open it before pulling. An untensioned rope leaves segments unloaded and out of position.

Field rule: no matter how tight the schedule, if any of the three checkpoints — fixed-wheel orientation, rod engagement, wire-rope lock-off — is wrong, stop and redo it. Continuing and patching later always costs more than redoing now.

In detail

Hardware Up Close

SCIS-IPI-01 lightweight in-place inclinometer string with slim rods and top connectors — Lightweight SCIS-IPI-01 sensor string — slim rods, top connectors and one RS485 bus for long-depth automated monitoring.

Schematic of chained inclinometer segments conforming to casing deformation, and a single segment with wheel sets — Chained segments deform with the casing; the double wheel sets keep each rod centered in the casing.

Engineering comparison

World-Leading Accuracy · High-Value Pricing

SCIS-IPI-01 combines a 128-node RS485 bus, AutoID addressing and a 120 g/m carbon-fiber rod. The result is less field wiring, simpler deep-borehole installation and a system designed for long-term automated monitoring.

Dimension	SoilCreate SCIS-IPI-01	Conventional Multi-Cable Systems
Wiring	One RS485 cable for 128 segments	Multi-core cable, one run per sensor
Signal & addressing	Digital bus + AutoID auto-addressing	Analog signal, per-unit configuration
Rod weight	Carbon fiber, 120 g/m	Metal rod, ~5× the weight
Deep-borehole install	Single person, by hand, 60–100 m	Heavier string, hoisting often needed
Offline resilience	16 GB storage, breakpoint-resume, remote upgrade	Depends on external logger
Commercial model	High-value project pricing	Varies by system and service scope

1/5

Rod Weight

Carbon fiber vs. a traditional metal rod.

1 : 128

Cable to Sensors

One RS485 line replaces 128 cable runs.

1×10⁻⁸

Long-Term Stability

Electrolytic-solution option vs. ~1×10⁻⁵ for the best MEMS.

VALUE

High-Value Pricing

World-leading accuracy in a project-ready system.

Track record

Where Real-Time Data Proved Its Worth

SoilCreate in-place inclinometers have supported long-term deep-displacement monitoring at major energy, foundation-pit and rail-transit projects. Minute-level automated sampling preserves changes that periodic manual surveys can miss.

Major energy project

Coastal Energy Site — the "Ocean Breathing" of a 107 m Borehole

In reclaimed soft soil 23 m from the sea, automated monitoring recorded an approximately 12-hour periodic casing-top movement with an amplitude near 100 mm. The continuous series provided clear evidence for identifying the influence of Ocean Tide Loading.

Foundation pit

Suzhou Xiangcheng Foundation Pit

Long-term automated monitoring captured twice-daily periodic displacement of the retaining structure, closely matching the tides — deformation that once-a-day manual surveys could never reveal.

Metro

Suzhou Metro Line 5

A deformation-rate exceedance triggered a Level III alert — pushed by SMS and app to the responsible parties before the construction team had noticed anything abnormal. The system is faster, and more accurate, than people.

FAQ

Frequently Asked Questions

What kind of casing does the in-place inclinometer require?

A standard grooved inclinometer casing. Each segment's spring-loaded wheels engage the casing's guide grooves, and the fixed wheels must be oriented toward the expected deformation direction. If a segment will not slide in during installation, the usual causes are a spring wheel that is not fully compressed or misalignment with the grooves — press the spring again and rotate the segment 90° to find the groove position.

No data is coming through after power-up — what should we check first?

Check remotely before dismantling anything on site: first the 4G SIM card (including balance), then the APN configuration, then the controller's 12 V DC supply. Note that a network outage alone does not lose data — each string buffers over a year of history in 16 GB of onboard storage and resumes uploading automatically when the connection recovers.

The data keeps trending to one side — is the sensor drifting?

Persistent one-sided readings usually point to a fixed-wheel orientation installed the wrong way, not sensor drift. The remedy is to re-install the affected string with the correct orientation — which is exactly why orientation is treated as a hard checkpoint during installation: with the wrong orientation, all alarms based on that borehole lose their meaning.

Who sets the alarm thresholds, and can they be changed later?

After the controller registers on the cloud platform, engineers configure per-point thresholds — both rate-of-change and cumulative values. When a reading exceeds them, the platform pushes SMS alerts. Thresholds can be revised, but every change should carry a version record; without that audit trail, a post-event review of "why did the alarm not fire" cannot be traced. The platform supports separate accounts for owner, contractor, supervisor and third-party users.

MEMS or electrolytic-solution sensor — which should a multi-year project choose?

MEMS accelerometers use metal measuring elements that fatigue over time (S Liu et al 2020, J. Phys.: Conf. Ser. 1520 012009); even the best hold roughly 1×10⁻⁵ long-term stability and need periodic recalibration. SoilCreate's proprietary electrolytic-solution sensor reaches the 1×10⁻⁸ level — its drift is more than an order of magnitude smaller than the ADC's own error — and needs almost no recalibration. For monitoring of five years or longer, choose the electrolytic-solution option.

If remote data turns anomalous, how do you locate the problem segment?

Through the installation archive. As each segment goes in, its number, depth, fixed-wheel orientation and wire-rope lock state are recorded, and every borehole is delivered with an installation archive, a segment-number-to-depth table, an initial-values table and a remote-online certificate. Any remote anomaly is first matched against this archive to identify the exact segment and depth before deciding whether site maintenance is needed. Also note the two end cables are factory-fitted and waterproof-tested — never loosen them on site.