What is included in the solution?
Signals are processed by the 2-channel NB01AA controller with a real-time display, site-adjustable alarm thresholds, 2 Form C relays for interlocks and beacons, and an RS-485 Modbus port to BMS/SCADA/DCS; optional IoT LoRa mobile alerts.
|
Component |
Code |
Function |
Quantity rule |
Type |
|
Oil leak sensor cable |
NA03AA |
Selective response to oil & organic solvents |
Per metre – per zone length |
Required |
|
2-channel chemical sensor controller |
NB01AA |
Display, alarm, Form C relays, RS-485 Modbus, IoT LoRa |
1 per 2 zones |
Required |
|
Chemical sensor connector |
NC01AA |
Connects the film to the controller |
2 per zone (both ends) |
Required |
|
24 VDC power supply |
SMPS 24VDC |
Powers the controllers, DIN-rail in panel |
≥ 24 VDC / 1 A (per NCT); size up for multiple controllers |
Required |
|
Master controller |
NB02AA |
Central management of up to 30 NB01AA via RS-485 |
When many NB01AA units are used |
Optional |
|
Corner / flexible link |
NC02AA / NC06A |
Turns and obstacle crossings |
Per route |
Optional |
|
SUS / PVC sensor case |
NF01A-C / NF02A-C |
Outdoor, tank-farm and impact protection |
Per protected section |
Optional |
|
Connector case / cover |
NF04A / NF05A |
Connector protection; walkway cover |
As required |
Optional |
|
Compact 24 VDC UPS |
NF07A |
Keeps leak monitoring alive during outages |
1 per panel |
Optional |
|
Control & alarm panel |
ND01AA |
Houses controllers, beacon/siren, WCDMA/RS-485/RF comms |
Per area / zone count |
Optional |
Required items form the minimum working configuration; Optional items are selected to suit site conditions.
How it works
-
The nano-carbon layer in NA03AA changes resistance on contact with oil/solvent; NB01AA compares it with the initial resistance (in %) and alarms when the lower/upper threshold is crossed.
-
Periodic auto-calibration (P-12…P-14) compensates drift from temperature and humidity – fewer nuisance alarms.
-
On alarm, ALARM1/ALARM2 lights per channel, the relay changes state and data updates over RS-485. After clean-up, replace the contaminated film and reset (P-03 = 1).
Typical applications
-
Diesel generator rooms, day tanks, fuel supply piping
-
Fuel depots, pump/filling stations, tank bunds
-
Hydraulic rooms, turbine lube-oil systems, compressors
-
Technical basements and car parks with oil piping
-
Solvent stores (ethanol, MEK, toluene…) in paint, printing and electronics plants
Benefits for contractors & owners
-
Oil-selective – ignores water: works outdoors and in wash-down areas
-
Also detects common organic solvents (ethanol, MEK, toluene…)
-
Controller with display, site-tuned thresholds and auto-calibration
-
Form C relays + RS-485 Modbus + IoT LoRa – flexible BMS/SCADA/DCS integration
-
Flexible 370 µm film fits flanges, tank bottoms and drip trays
-
S-Mark, CE, KC certified
Technical specifications
NA03AA oil leak sensor cable
|
Parameter |
Value |
|
Part number |
NA03AA |
|
Type |
Film-type oil leak detection sensor |
|
Detectable substances |
Petroleum-based oils: gasoline, diesel, kerosene, turbine oil, etc.; organic solvents: ethanol, 2-ethoxyethanol, methyl ethyl ketone, toluene, etc. (others: contact us) |
|
Dimensions |
Width 36 mm / Thickness 370 µm |
|
Operating temperature |
-30 to 100 °C |
|
Material |
PET |
|
Features |
Reacts directly with oil for fast, accurate detection; selective nano-carbon material – does not alarm on water |
|
Sales unit |
Per metre |
|
Precaution |
Not standalone – use with NB01AA controller and NC01AA connectors; replace the sensor after oil contact |
NB01AA chemical leak sensor controller
|
Parameter |
Value |
|
Part number |
NB01AA |
|
Channels |
Up to 2 sensors (CH1, CH2) |
|
Dimensions |
96 (W) × 66 (H) × 29 (D) mm |
|
Power supply |
24 VDC, 200 mA |
|
Communication |
RS-485 Modbus, 9,600 bps (ID 1–99); IoT LoRa – monitoring and control via mobile app |
|
Relay output |
1 Form C × 2 (one relay per channel), 1 A 24 VDC / 0.5 A 125 VAC |
|
Sensor input range |
1 kΩ to 5,000 kΩ |
|
Display / setup |
4-digit FND display, STATUS / POWER / ALARM1 / ALARM2 LEDs, 4 setup keys; alarm thresholds & auto-calibration as % of initial resistance (default 80% / 130%) |
|
Data |
Real-time value on site, sensor response data logging |
|
Operating temperature |
-30 to 100 °C |
|
Housing material |
PP |
|
Certifications |
S-Mark, CE, KC |
NB02AA master controller
|
Parameter |
Value |
|
Part number |
NB02AA |
|
Function |
Centrally manages up to 30 NB01AA controllers in parallel on RS-485 |
|
Dimensions |
108 (W) × 112 (H) × 35 (D) mm |
|
Power supply |
24 VDC, 200 mA |
|
Communication |
RS-485 Modbus, 9,600 bps |
|
Relay output |
1 Form C, 1 A 24 VDC / 0.5 A 125 VAC |
|
Operating temperature |
-30 to 100 °C |
|
Housing material |
Aluminium (AL) |
Sensor connectors
|
Code |
Type |
Dimensions |
Notes |
|
NC01AA |
Chemical sensor connector (NA01AA/NA02AA/NA03AA) |
55.5 × 18 × 12.6 mm |
Single type (no START/END); each connector cable is wired to NB01AA |
|
NC02AA |
Link (corner) connector |
75 × 75 × 12.6 mm |
For corners/bends; compatible with leak and chemical sensors |
|
NC06A |
Flexible link connector |
55.5 × 18 × 12.6 mm × 2 |
Adjustable intermediate cable – crosses columns, beams, gaps; compatible with leak and chemical sensors |
Material PVC, operating temperature -30 to 100 °C.
Protective accessories & backup power (optional)
|
Code |
Name |
Material |
Dimensions / data |
Purpose |
|
NF01A / NF01B / NF01C |
Sensor protective case (SUS) |
SUS (inox) |
115 × (200–500 / 501–1,000 / 1,001–2,000) × 50 mm |
Film installed inside; liquid entering through the bottom is detected – mechanical, dirt and outdoor protection |
|
NF02A / NF02B / NF02C |
Sensor protective case (PVC) |
PVC |
115 × (200–500 / 501–1,000 / 1,001–2,000) × 50 mm |
For areas where metal cannot be used – especially highly corrosive chemical areas |
|
NF04A |
Connector protective case |
SUS |
70 × 80 × 50 mm |
Protects connectors from environmental factors and impact |
|
NF05A |
Sensor protective cover |
SUS |
40 × 15 × 2,400 mm, 1.2 mm thick |
Cover over the film, fixed with saddles; label on top – for walkways and trolley areas |
|
NF07A |
UPS – compact 24 VDC model |
— |
84 × 72 × 42 mm; 14.4 V × 3,000 mAh; I/O 24 V (±10%); 400 g |
Panel-mounted 24 VDC backup for controllers (KC, CE) |
|
NF06A |
UPS – standard model |
— |
101 × 279 × 142 mm; 12 V / 7 Ah; I/O 220 VAC (±10%, 50/60 Hz); 4.2 kg |
Keeps the alarm system running during outages (KC, CE) |
Wiring & system integration
BMS / SCADA / DCS integration
|
Method |
NB01AA output |
To system |
Notes |
|
Relay contacts |
2 × 1 Form C relays (NO/NC/COM), one per channel; 1 A 24 VDC / 0.5 A 125 VAC |
DDC/PLC DI, beacon/siren, pump trip / valve interlock |
Dry contacts – direct wiring |
|
RS-485 Modbus |
RS-485 Modbus, 9,600 bps, ID 1–99 (parameter P-01) |
BMS/SCADA/DCS via Modbus gateway; read status and resistance/% values (U-01, U-05) |
Multi-drop bus; up to 30 units managed by NB02AA master |
|
IoT LoRa |
LoRa network |
Mobile app – remote monitoring & alerts |
Ideal for unmanned warehouses and remote areas |
Quick setup: P-01 = Modbus address; P-02 = number of sensors (1 or 2); P-10/P-11 = lower/upper alarm limits (% of initial resistance, default 80%/130%); P-12/P-13/P-14 = auto-calibration; recommended display U-05. Detailed Modbus register map: supplied by DLK per project.
Installation & operation notes
-
Place the cable at the lowest point oil reaches first: bund floor, drip trays under pumps/valves, along pipe trenches.
-
Insert the film into NC01AA between electrode and rubber seal, with the electrode between the cover film and sensing film; tighten the cover.
-
Wire to NB01AA sensor terminals with correct polarity (+/–), apply 24 VDC; set P-01 (ID), P-02 (sensor count), check U-05 = 100%.
-
Outdoors or in traffic areas use SUS case NF01 or cover NF05A; house connectors in NF04A.
Quantity take-off example
Example: generator room with 2 zones (around day tank 8 m, fuel trench 12 m)
|
Item |
Quantity |
|
NA03AA |
20 m |
|
NB01AA |
1 unit |
|
NC01AA |
4 pcs |
|
SMPS 24 VDC ≥ 1 A |
1 unit |
|
BMS signals |
2 relay contacts + RS-485 Modbus |
Frequently asked questions (FAQ)
Does NA03AA alarm on water?
No. NA03AA uses a selective material that reacts only to oil and organic solvents, so it suits outdoor and wash-down areas.
Which oils can it detect?
Gasoline, diesel, kerosene, turbine oil and organic solvents such as ethanol, 2-ethoxyethanol, MEK and toluene. For other oils, contact DLK for testing.
How does NB01AA connect to the BMS?
Two Form C relays (dry contacts) and an RS-485 Modbus port at 9,600 bps. Units can share one bus; NB02AA manages up to 30 units centrally.
Can the cable be reused after a leak?
The film section that contacted oil must be replaced; connectors and controller stay. Reset with P-03 = 1 after replacement.
Is backup power needed?
A 24 VDC NF07A or NF06A UPS is recommended so alarms keep working during outages.
DLK Trading Service Company Limited is NCT's (Nano Composite Technology, Korea) authorized strategic partner in Vietnam. DLK supplies 100% new genuine products with full import documents, and supports contractors and factories with system sizing and BOQ take-off from drawings, wiring, commissioning and signal integration into BMS / SCADA / DCS.
Need a quotation from drawings / BOQ? Send DLK your layout and the list of zones to monitor – DLK engineers will propose the configuration, take off quantities and provide a BMS wiring diagram. Hotline:
+84 93 279 2697 – Sales:
+84 70 357 0101.
Data sources: NCT catalog, NCT Leak Sensor Manual, NCT All Conductive Liquid Sensor Manual, nctech.co.kr. Specifications may change with product revisions – please confirm with DLK before ordering.