Economical
Effective, low-cost material level detection in a wide variety of applications, and a desirable alternative to electromechanical level switches. No expendable parts to buy and stock. No expensive, extra-cost options.

Maintenance-Free
Unlike paddle wheels, vibrating tines or other mechanical instruments, there are no components to jam, break or wear out. No need for routine maintenance, cleaning or replacing of worn parts.

Reliable Operation
Cote-Shield circuitry allows the Z-tron III to ignore coatings or build up on the sensing element. There are no false signals from dust or tunneling.

Easy-Installation
One-piece unit is easily installed through a single 3/4-inch vessel opening. Calibration is quick and simple.

Z-tron III™ Point Level Switch, a reliable low-cost, on/off level switch
The low-cost, Drexelbrook Z-tron III level switch is unaffected by sticky coatings and impervious to corrosive liquids. The all-electronic design means no moving parts to wear, break or fail. Based on field-proven RF technology, the Z-tron III is a simple and reliable on/off level switch.

The compact one-piece unit is inserted through a standard 3/4-inch NPT opening into the vessel so that the sensing element is positioned at the desired high or low level. (Other connection types and sizes are also available.) When the material level reaches a predetermined point on the sensing element, it causes a change in status at the electronic unit, resulting in actuation of the DPDT relay. The relay can be used to operate alarms, annunciators, valves, or other control or indication devices.

Drexelbrook's exclusive Cote-ShieldTM circuitry enables the Z-tron III to ignore dust pileups, coatings, and sticky buildups on the sensing element.
Suspended dust particles are also no problem as the Z-tron III reacts only to actual high or low level conditions.

Specifications

Power requirement
120 ± 25 Vac, 50/60 Hz (std.)
230 ± 25 Vac, 50/60 Hz (optional)
15-30 Vdc (optional)
(1 Watt maximum)

Output
DPDT relay

Contact Rating
Non-inductive 5A @ 120 Vac or 2A @ 230 Vac
Min. Rating 100mA/12VDC

Spark Tolerance
100 A (std)

Fail Safe
High (HLFS) or Low (LLFS) field adjustable

Response Time
Approx. 0.2 sec. Adjustable 0-60 seconds

Sensitivity
0.3 pF

Differential
Worst case with horizontal sensing element, 1/64"(.4mm) or less

Recommended Ambient Electronics Temperature
-40°F to 145°F* (-40oC to 63oC)
*Unit will operate above 145°F but with reduced component life.

Temperature Effect
± 0.5 pF/50°F(10oC)

Line Voltage Effect
± 0.2 pF/20V

Sensing Element Connection
3/4" NPT (Optional Flange Mount)

Sensing Element Wetted Parts
316SS & PEEK (2)

Process Pressure & Temperature
200 psi at 250F
14 BAR at 121C

Approvals
UL/CUL/508 General Purpose
CE Mark

Housing
NEMA 1through 5 & 12