Z-tron IV™ Point Level Switch, a reliable low-cost, on/off level switch
The low-cost, Drexelbrook Z-tron IV 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 IV is a simple and reliable on/off level switch.
The compact one-piece unit is inserted through a standard 3/4-inch , probe dependent, 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.
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 IV 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, probe dependent vessel opening. Calibration is quick and simple.
Drexelbrook's Exclusive Cote-Shield™
Cote-Shield enables the Z-tron IV to ignore dust pileups, coatings, and sticky buildups on the sensing element.
Power Requirements:
AC Units - Field Adjustable:
95-145 VAC, 50/60 Hz, 2 Watt
215-265 VAC, 50/60 Hz, 2 Watt
DC Units:
24 VDC Unit: 19-29 VDC input, 2 Watt
Sensitivity:
0.3pF or less
Operating Point Range:
0 - 80 pF (20 Turn Pot / 4 pF per Turn)
Extended range with external pad capacitor, Pad ratio 1:1
Load Resistance:
Center to Ground, 1500 Ohms
Center to Shield, 750 Ohms
Shield to Ground, 750 Ohms
Failsafe:
Field adjustable to either High-Level Fail-Safe (HLFS)
or
Low-Level Fail-Safe (LLFS)
Output:
DPDT relay closure
Contact Rating:
5A @ 120 Vac non-inductive
2A @ 230 Vac non-inductive
Ambient Temperature:
-40°F to 145°F (-40°C to 63°C)
Temperature Effect:
0.5pF/50°F
Line Voltage Effect:
0.2pF/20V @ 120 Vac
Stability:
0.15pF/6 mo. maximum shift
Spark Protection:
100 Amp
Mounting: (Probe Dependant)
¾-inch NPT (Typical)
Housing:
The standard housing meets the following classifications:
Nema 1 General-Purpose
Nema 2 Drip-Tight
Nema 3 Weather-Resistant
Nema 4 Waterproof
Nema 5 Dust-Tight
Nema 12 Industrial Use
FM approval on housing only. If agency approval is required, use the Drexelbrook PXL The Point™ instrument for point level control.
Time Delay:
0-60 seconds (3/4 Turn Pot) 270° Potentiometer
Approvals
FM / FMC 3810 General Purpose (Pending)
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