CONSTRUCTION
Body: Stainless Steel (AISI 304)
Sensing head: Hardened stainless steel. (wear resistant surface coating also available.)
Faceplate: Alumina ceramic

MOUNTING DETAILS
Sensor typically clamped to vertical 25mm (1 inch) square mild steel bar (supplied by customer) welded to rotating scraper blade arm. Recommended mounting details for both rotating pan and static pan mixers available on request.

MEASUREMENT TECHNIQUE
Hydronix digital resonant microwave technique.

RANGE OF MOISTURE
Sensor will measure up to saturation of material. Usually around 15% in standard concrete mixes, higher in lightweight aggregates.

PENETRATION OF FIELD
Approximately 75-100mm, dependent on material.

POWER SUPPLY
+15V to 30V DC, 4 Watt max.

OPERATING TEMPERATURE
0-60º C. The sensor will not measure in frozen materials.

REFRESH RATE
Outputs are updated approximately 25 times per second.

DIGITAL COMMUNICATIONS
Available for all applications. Opto-isolated. RS485 2-wire port. Refer to your distributor for read/write access to sensor parameters and values.

INPUTS AND OUTPUTS
Available for applications when sensor is static, and connected by standard cable.
Analogue outputs: Two configurable outputs 0-20mA or 4-20mA current loop source available for moisture and temperature. Also may be converted to
0-10 V dc.
Discrete inputs/outputs: Two inputs available for ‘batch average’, start/stop or moisture temperature multiplexing. One output available to indicate ‘out of range’. Refer to manual for further information.

GROUNDING
The sensor body is connected to the cable shield. Ensure equipotential bonding of all exposed metalwork. In areas of high lightening risk correct and adequate protection should be used.

EXTENSION CABLE

When using standard cable connection with static sensor applications:

Cable: Six twisted pairs (12 cores total) screened (shielded) cable with 22 AWG, 0.35mm2 conductors.
Screen (shield): Braid with 65% minimum coverage plus aluminium/polyester foil.

Maximum length: 100m, separate to any heavy equipment power cables.
For all other applications when using rotating connector or radio modem.

Cable: 4 core with overall screen
Wire size: 16/0.2mm (0.5mm2)
Impedance: 40Ohm/km
Capacitance: 98pF/m

OPTIONS

Sensing Arms:
Available in various lengths. Current standard lengths (length L in diagram) 560mm, 700mm or 1420mm.

Wear Bands:
Easily replaceable wear bands that protect the most vulnerable wear areas dramatically extend the wear life of the sensor – sold in pairs.

Rotating Connectors:
for ORB1 (order code ORBR1), 4-way mercury rotating connector housed in a robust nylon assembly suitable for use on static pan mixers with central hole. Supplied with blank nylon fixing flange and integral junction box.

NOTES

1. The sensor body should be as far above the surface of the mix as possible to keep it out of harm’s way. Hence determine the maximum length (dimension L) possible for your mixer, ensuring there is sufficient clearance (headroom) as the sensor rotates through the mixer.
2. With rotating pan mixers it is preferable to specify the length of the arm such that the body of the sensor is above the lid of the mixer.

HOW TO ORDER

For further information, please contact
the appropriate Hydronix office, or your nearest dealer. If possible, please have available the make, type and size of mixer for the application in mind so that we can provide you with the correct information.