- Synoptic board of alarms on the front
- Automatic sensor recognition: Hydrocarbons, sludge, overfill
- 3 Output relays, change-over contacts
- Audible alarm (buzzer)
- Intrinsic safety Ex II (1) G [Ex ia] IIB
- Applications: Oil-water separator monitoring: Meets the requirements of EN 858-1 and 2, for light liquid separators, sewage treatment
Alarm Unit
| Main power supply: | 230 V AC – 50 Hz |
| Consumption: | About 9 VA (with 3 probes connected) |
| Probe inputs: | inputs with automatic probe recognition, indifferently: Probe NivOil-OP for hydrocarbons layer thickness detection Probe NivOil-HP 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, 230 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 (1) G [Ex ia] IIB |
| 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 07 ATEX E 090 (The alarm unit must be installed in a non-hazardous area) |
| 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-HP for overfill detection
| Probe body: | Antistatic PE |
| Sensor: | 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: 195 mm |
| Protection: | IP 68 according EN 60529 |
| Detection principle: | PTC sensor, heated |
| Temperature limits: | -20 to +60 °C |
| EC-Type Examination Certificate: | BVS 07 ATEX E 092 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 3 to the BTA (BVS 07 ATEX E 092 § 15.3.1). |
| Intrinsic safety: | Ex II 1 G Ex ia IIB T3 |
NivOiL-SP for settled sludge level detection
| Probe body: | PVC |
| Sensor: | 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 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) |
| Ex loop impedance: | The maximum permissible values (Uo, Io, Po and Co, Lo) of the intrinsically safe detection loop are given in Annex to the BTA (BVS 07 ATEX E 021 X § 15.3.1). |
| Intrinsic safety: | Ex II 1 G Ex ia IIB T4 |
BAMO NivOil 230 V AC alarm unit (BVS 07 ATEX E 090) monitors levels in oil/water separators, up to three detection probes:
- NivOil-OP oil layer thickness probe (BVS 07 ATEX E 091 X) detects the thickness of hydrocarbons fluids layer floating over the water.
- NivOil-HP overfill probe (BVS 07 ATEX E 092 X) detects the overfill level in the separator. This alarm can inform that drainage is blocked.
- NivOil-SP sludge level probe (BVS 09 ATEX E 021 X) detects the highest permissible level of the 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 NivOil-CU 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); If necessary, it can be disabled through a DIP switch.