Liquid Level Controller

• Automatic control of liquid level • Solid-state sensing circuit • Adjustable sensitivity

Liquid Level Controller

The Model 409 Liquid Level Controller is a compact, socket-mount device for level control of conductive liquids. The Internal relay is energized when operating power is applied. When the liquid level reaches the probe, the relay de-energizes. When the level drops below the probe, the relay will reset.

A fixed, two-second time delay prevents oscillation due to wave action. Probe cables may be shielded or unshielded. If the liquid container is made of a non-conductive material, a common electrode is required. Other features include an LED indicator to show the output relay status and an adjustable sensitivity setting. Options such as a normally de-energized relay, longer time delays, etc., are available on request. Requires a standard 8-pin octal socket. (socket number 51X00120-01)

Liquid Level Controller Specifications:
Model 409

Operating voltages:
24 VAC: 20-30 VAC, 50-400 Hz 120
VAC: 90-140 VAC, 50-400 Hz 230
VAC: 200-250 VAC, 50-400 Hz

Power consumption: 2.5W

Transient Protection: 2500VRMS for 10msec

Probe Voltage: 2 VAC (logic level)

Probe Current: 5mA maximum

Sensitivity Adjust: 1K ohms-100K ohms

Contacts: SPDT

Contact Rating: 10A @ 240 VAC resistive

Expected Relay Life:
Mech: 10,000,000 operations
Elec: 100,000 at rated load

Response Time: 2 seconds

Reset Time: <1 second

Reset Method: Automatic

Time Delay Accuracy: ±5%

Operating Temp: - 40° to 60° C

Humidity Tolerance: 0-97% w/o condensation

Case Material ABS: plastic

Weight: 4.5 oz. Max.