- Low power consumption
- 10 to 27 V DC power supply input
- Zone 0 ATEX certified (Zone 2 for the alarm device location)
- Solar-powered or standard electric battery
- Energy-saving mode adjustable (control frequency adjustable from 6 min up to 9 days)
- 3 inputs, for any NIVOIL probes
- Automatic recognition of type probe
- 3 relay outputs with audible alarm
Alarm Unit
| Main power supply: | 10 to 27 V DC |
| Consumption: | 0.1 W / 12 V DC (with 3 probes connected) |
| Probe inputs: | Inputs with automatic probe recognition, indifferently: Probe NivOil-OP for hydrocarbons layer thickness detection Probe NivOil-HPS for overfill detection Probe NivOil-SP for settled sludge level detection |
| Monitoring: | Alarm unit NivOil-CU is equipped with a broken or short circuit control on each detection loop |
| Outputs: | 3 Relay outputs, 250 V AC, 3A; Potential free changeover contact |
| Display and signals: | 1 Operating channel LED (green) on each channel 1 alarm LED (red) on each channel Built-in audible alarm, disabled by DIP switch) |
| Temperature limits: | -20 to +60 °C |
| Intrinsically safe unit: | Ex II 3 (1) G Ex nAC [ia Ga] IIB / IIA T4 Gc |
| Ex loop impedance: | The maximum permissible values (Uo, Io, Po and Co, Lo) of the intrinsically safe input circuits can be found in Annex 1 to the BTA (BVS 07 ATEX E 090 / § 15.3.2) per channel and in conjunction with the NivOil probes. |
| EC-Type Examination Certificate: | BVS 10 ATEX E 011 (The alarm device may be mounted in Ex area, zone 2) |
| Protection: | IP 65 according EN 60529 |
| Front panel, interface: | 2 push buttons for diagnostic test and alarm clearance |
NivOil-OP for hydrocarbons layer thickness detection
| Probe body: | Antistatic PE |
| Sensor end: | Stainless steel 316 L |
| Cable: | Resistant to hydrocarbon fluids, 2x 1 mm²; blue colour; standard length: 10 m, Other lengths on request; Extension: up to 300 m, [C] line ≤ 200 nF/km and [L] line ≤ 1 mH/km |
| Dimensions: | About O.D. 32 mm; Height: 230 mm; With marks each 5 cm for height adjustment |
| Protection: | IP 68 according EN 60529 |
| Detection principle: | Capacitive detection, high frequency |
| Temperature limits: | -20 to +60 °C |
| EC-Type Examination Certificate: | BVS 07 ATEX E 091 X (For zone 0) |
| Ex loop impedance: | The maximum permissible values (Uo, Io, Po and Co, Lo) of the intrinsically safe detection loop are given in Annex 2 to the BTA (BVS 07 ATEX E 091 / item 15.3.1). |
| Intrinsic safety: | Ex II 1 G Ex ia IIB T4 |
NivOiL-HPS for overfill detection
| Probe body: | PVC |
| Cable: | Resistant to hydrocarbon fluids, 2x 1 mm²; blue colour; standard length: 10 m, Other lengths on request; Extension: up to 300 m, [C] line ≤ 200 nF/km and [L] line ≤ 1 mH/km |
| Dimensions: | About 145 x 90 x 25 mm |
| Protection: | IP 68 according EN 60529 |
| Detection principle: | Ultrasonic sensor |
| Temperature limits: | -20 to +60 °C |
| EC-Type Examination Certificate: | BVS 09 ATEX E 021 X (For zone 0) |
| Intrinsic safety: | Ex II 1 G Ex ia IIB T4 |
NivOiL-SP for settled sludge level detection
| Probe body: | PVC |
| Cable: | Resistant to hydrocarbon fluids, 2x 1 mm²; blue colour; standard length: 10 m, Other lengths on request; Extension: up to 300 m, [C] line ≤ 200 nF/km and [L] line ≤ 1 mH/km |
| Dimensions: | About 145 x 90 x 25 mm |
| Protection: | IP 68 according EN 60529 |
| Detection principle: | Ultrasonic sensor |
| Temperature limits: | -20 to +60 °C |
| EC-Type Examination Certificate: | BVS 09 ATEX E 021 X (For zone 0) |
| Intrinsic safety: | Ex II 1 G Ex ia IIB T4 |
BAMO NivOil 12 V DC alarm unit is designed for the monitoring of hydrocarbon fluids separators. The alarm device NivOil may be connected to 1, 2 or 3 sensors:
- NivOil-OP oil layer thickness probe detects the thickness of hydrocarbons fluids layer floating over the water.
- NivOil-HPS overfill probe detects the overfill level in the separator. This alarm can inform that drainage is blocked.
- NivOil-SP sludge level probe detects the highest permissible level of sludge layer. As soon as the sludge level has reached too high level an alarm signal is triggered.
All detection loops are automatically set up (self-recognition). Therefore it is possible to connect any of the three intrinsically safe NivOil probes to any of the three intrinsically safe channels of the NivOil alarm unit. The alarm unit detects for each channel which probe is connected and indicates the corresponding LED on the front panel. If a channel is not assigned, its LEDs remain dark during operation. The unit has a built-in audible alarm (piezo).
NivOil model working with a 10 to 27 V DC power supply has low energy consumption. It is designed for the use of a solar-powered battery or any standard electric battery (consumption is 0.1 W – 12 V DC – with 3 sensors connected with one complete control cycle per hour).