The Ramsey Microwave Plugged Chute Detector is a safe, reliable and environment-friendly units that can see through non-metallic wall build-up and detect the presence or absence of any material. It provides high and low level point level detection and can be used in many applications, including high temperature ones.
Product Detail
The Ramsey Microwave Plugged Chute Detector from Thermo Fisher Scientific is a totally non-contacting microwave plugged chute detector with a range from 10 cm (4 in) minimum to 150 m (492 ft) maximum. These reliable units can see through non-metallic wall build-up and detect the presence or absence of any material.
The switch can be used in pressurized coal down comers; electro-static precipitator hoppers; and in fly ash, clinker and coal transfer chutes. It provides high and low level point level detection.
High temperature applications are not a problem for the Ramsey Microwave Plugged Chute Detector. Each unit is protected from the process by a polyethylene, ceramic or tempered safety sight glass window. The switch is a safe and environment-friendly replacement for nucleonic switches and is not restricted by OSHA or FCC regulations.
115 VAC nominal, 100-130 VAC acceptable, 50-60 Hz; 240 VAC nominal, 200-270 VAC acceptable, 50-60 Hz; AC supplies lined fuse: 100 mA, 250 VAC; Both MRS & MRR units include terminals for 24 VDC power supply
Power Consumption :
MRA <5 VA Remote Amplifier
Power Density :
Rated from sender (MRS) to receiver (MRR) at approximately 20µW/cm²; no interconnection wiring between sender and receiver; Complies with FCC Title Rules Part 15; Caution sign posting not required
10 cm (4 in); Minimum ranges are dependent on application conductivity
Mounting - 1 :
1. DN80 (3 in - NPT) male thread or four 6 mm (0.250 in) blind bolt holes in flange; A. DN80 (3 in - NPT) weldments supplied for standared integral mounting; B. Flange is used for remote mount in high vibration applications - isolation shock mounts are available
Mounting - 2 :
DN100 (4 in - NPT) weldments with PTFE (Teflon) and UHMW windows
Mounting - 3 :
Ceramic window assemblies
Mounting - 4 :
Firebrick window assemblies available on custom basis
Mounting - 5 :
DN50 (2 in - NPT) sight glass window
Mounting - 6 :
Waveguides - custom assemblies available
Adjustments - MRA :
Test swtich - momentary push-button. Single turn coarse and single turn fine adjustment potentiometers for set point. Relay time delays adjustable from 100 ms to 30 seconds via two independent on/signal make and off/signal break potentiometers with automatic reset.
Fail Safe - Switch Selectable :
Presence or absence of material
High level fail-safe position :
Relay is activated when material is present
Low level fail-safe position :
Relay is activated when no material is present
Temperature :
MRS & MRR: -30°C to +65°C (-20°F to +150°F). For higher temperature applications, remote mounting with windows is necessary. Custom waveguide assemblies can also be provided.
Temperature - WHMW Window :
+80°C (+176°F)
Temperature - Ceramic Window :
+800°C (+1,470°F)
Temperature - Firebrick Assemblies :
Consult factory for manufacturer's specifications.
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