Mobrey Ultrasonic Gap Sensor Level Systems
Mobrey has been manufacturing high quality ultrasonic point level equipment for many years and has built up considerable expertise in the supply of high reliability, specialist sensing systems.
A range of standard or custom designed ultrasonic sensors and remote control units is available, for use in a variety of liquid applications, ranging from industrial level detection, through self-checking high integrity systems.
|
Features
- No moving parts
- Choice of control electronics
- Industrial:
- Local control box with alarm and fault output relays
- High Integrity:
- Electrosensor self-checking control electronics for control room mounting using 2 wire cabling
- Intrinsically Safe (IS) system certification
Benefits
- Low maintenance
- Low cost of installation
- Choice of systems to suit budge
|
|
|
|
| |
|
| Repeatability (mm) |
|
| Maximum Pressure (d) (bar) |
|
| Weight (gm) |
|
| Standard Frequency (MHz) |
|
| Standard Cable Length |
|
| Power Consumption |
< 10 milli-watts (mW) at sensor |
| Cable Entry |
Cable entry to sensor is IP65 |
| Mean Time Before Failure |
MTBF of stainless sensors found to be 0.15 x 10.6/hr |
| Temperature Shock Range |
–94 to 248 °F (–70 to 120 °C) if applicable |
| Mechanical Shock |
Tested to withstand 20G minimum |
| Non-operational Temperature Limit |
347 °F (175 °C) typical |
| Sensor cable |
Standard is PTFE-insulated dual coaxial with PVC sheath |
| Minimum bend radius is 1.4 in. (35 mm) |
| Radiation resistant cable, suitable for 100 Megarads, may be supplied to order |
|
|
|
|
| |
MCU201 |
MCU203 |
|
| Power Supply (Selector Switch) |
110/120 Vac |
24 Vdc earthed |
|
| 220/240 Vac |
negative |
|
| Power Consumption |
6 VA |
0.1 A |
|
| Relay Output |
DPCO |
| Relay Rating |
5 A at 230 Vac |
| Box Dimensions |
7.9 x 4.7 x 3 in. (200 x 120 x 75 mm) |
| Box Rating |
IP65 Polycarbonate |
| Holes For Glands |
3 off 0.63 in. (16 mm) diameter |
| Fixing Centres (WxH) |
7.4 x 3.4 in. (188 x 88 mm) |
| Fixing Hole Diameter |
0.16 in. (4 mm) |
| MCU200 Features |
Suitable for all Mobrey ultrasonic point sensors |
| Frequency Selection |
By switch on PC board |
| Relay |
Energized for sensor wet or dry selectable by switch |
| LED Indicators |
- Visible through the box lid
- Green for normal. Red for alarm
- Selectable for wet/dry sensor as appropriate for the application
- Amber LED for fault condition |
| Gain Potentiometer |
Fitted with scale and separate range switch to adjust for sensor type and site conditions |
| Response Time |
- Selectable delay of 0.5, 2, 8 or 30 seconds
- Delay selectable wet-to-dry or dry-to-wet
- 50 ms response in opposite direction |
| Sensor Cable Check |
- Selectable to monitor coax screen to sensor for continuity
- Fault lights fault LED and sets relay to alarm state |
| Auxiliary Input |
External closed circuit input to MCU200 latches the output relay to achieve pump control |
|
|
|
Electrosensor System (Ultrasonic Sensor with Head Electronics and Control Room Electronics |
| Design Concept |
Will de-energise relay on loop current levels falling outside of preset limits (i.e. open or shortcircuit) |
| All control room electronics have visible LEDs |
| LED Indicators |
ATEX II(1)G [EExia] IIC:
MES2D/3S requires separate external safety barriers |
ATEX II (1) G
for connection to the sensor in a hazardous area |
Stand alone electronics: MES3L/*S
(Operates One Electrosensor or Two Sensors for Pump Control) |
| Alarm Relay Output |
Selectable using PCB switch:
energised for sensor wet or sensor dry |
| When two sensors are connected, relay assumes a pump control function and PCB switch selects whether the relay is energised to fill or empty the tank between the two sensors |
| Fault Relay Output |
De-energizes on fault condition |
| PCB switch selects whether the fault condition also de-energizes the alarm output relay |
| Relays (2) |
2 x SPCO 100 VA maximum / 5 A maximum |
| Cable Entry |
Via base cutouts through rubber grommets to terminal strip |
| Voltage |
- MES*L/1S: 230 Vac (50/60 Hz)
- MES*L/2S: 115 Vac (50/60 Hz) |
| Output To Sensor |
Mains powered units: 12v DC intrinsically safe, fully floating (galvanically isolated) |
| Delay |
0.5 s wet-to-dry, and 50 ms dry-to-wet |
| Ambient Temperature |
140 °F (60 °C) |
| Power Consumption |
8 VA |
| Protection |
IP20 |
| Power Supply Tolerance |
AC mains ±10% |
- Petroleum processing
- Chemical processing
- Pharmaceutical
- Cryogenic liquids
- Water industry
- Interface detection
|
|
|
