Mobrey Ultrasonic Gap Sensor Level Systems
Liquid level detection for niche applications
This is a range of in-tank mounted and pipe-mounted ultrasonic liquid level switches (gap sensors) combined with remote-mounted Mobrey MCU200 Series industrial control units (MCU201/MCU203), for use in a variety of liquid applications including industrial level detection and interface duty.
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 for niche applications.
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Features
- No moving parts
- Simple installation
- Ignores foams
- Unaffected by radio frequency interference, conductivity, droplets, most coatings, and liquid color/opacity
- Local wall-mounted control box with alarm and fault output relays
Benefits
- Low maintenance
- Low cost of installation
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| Mounting |
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| Repeatability (mm) |
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| Maximum Pressure (d) (bar) |
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| Weight (gm) |
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| Standard Frequency (MHz) |
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| Standard Cable Length (m) |
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| 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 106/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 |
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MCU201 |
MCU203 |
| Power Supply |
110/120 Vac or 220/240 Vac (selectable switch) |
24 Vdc grounded (earthed) 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 0.65 in. (16.5 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 |
- Petroleum processing
- Chemical processing
- Water industry
- Interface detection
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