Level switches Minimelder-R and Maximelder-R

Level switches  Minimelder-R and Maximelder-R

Application

Designed to signal minimum or maximum levels of water, heating oil EL, L, M, oil/water mixtures and 
neutral, non-viscous and non-adhesive liquids in tanks. System owners are alerted when the supply 
runs low or if there is a hazard of overfi lling.

Description
Minimelder/Maximelder consist of a control unit and a height-adjustable fl oat probe. The Minimelder 
probe is mounted in the bottom area of the tank and generates an alarm signal when the liquid level 
falls and the probe is no longer submerged in the liquid. The Maximelder probe is mounted in the top 
area of the tank and generates an alarm when the liquid reaches the probe. The liquid levels are 
adjustable. When these levels are reached, the units generate visual and audible alarms. The integrat-
ed relay can be used for transmission of the signal to external alarm equipment or for connection to 
telecommunication or building control systems. 
Alarm units with the EnOcean-ready label can be integrated into your existing building automation 
systems at a later point in time. To do so, plug the EnOcean ®  wireless module TCM 320 into the 
EnOcean ®  interface (PCB of the device). The AFRISO gateway in conjunction with additional AFRISO 
products with EnOcean ®  wireless technology allow you to confi gure a whole range of fully customisable
extensible features for the protection of plants and buildings.

Technical 
specifi cations
Operating temperature range
Medium:          -5/+50 °C
Ambient:          -5/+55 °C
Process connection 
Plastic screw fi tting G1, with cable gland for 
height adjustment
Probe
Magnetic fl oat switch
L x Ø:     85 x 25.2 mm
Float:      Plastic (PA/PP)
Cable:    5 m oil-resistant cable 2 x 0.5 mm 2
Weight:  Brass
Degree of protection: IP 68 (EN 60529)
Probe voltage: Max. 17 VAC
Connection probe – control unit
Length: 5 m (optionally up to 50 m) 
Supply voltage (control unit)
AC 230 V
Power input
5 VA
Switching output
Relay contact:   1 voltage-free changeover contact
Contact rating:  AC 250 V, 2 A
Visual indication
1 green   LED (operation)
1 red       LED (alarm)
Audible alarm
Integrated piezo buzzer, can be acknowledged

Function test
By means of Test key
Housing
Wall mounting housing made of 
impact-resistant plastic (ABS)
W x H x D: 100 x 188 x 65 mm 
Degree of protection: IP 30 (EN 60529)