About the Square type inductance proximity sensors IMF3
The Square type inductance proximity sensors IMF3 is part of the ELEHPD Square Inductive Type range. INDUCTIVE SWITCH SQUARE TYPE PROXIMITY SENSOR IMF3 ELEHPD manufactures and exports low voltage electrical products from Yueqing, Zhejiang, China, supplying distributors, panel builders, M&E contractors and OEM buyers worldwide.
Full catalogue description: square type inductance proximity sensors IMF3 PNP NPN 5mm detect distance
Typical applications
- Motor control centres and pump or fan starters
- Machine building, conveyors, packaging and CNC equipment
- HVAC control panels and building automation
- Water treatment, irrigation and pumping stations
- Panel retrofits replacing electromechanical control gear
How to specify the right Square Inductive Type
- Size the contact rating for the inductive load, not just the resistive current (AC-3 duty for motors)
- Check the coil voltage and frequency available in the panel: 24 V DC, 110 V, 230 V or 400 V AC
- Confirm the auxiliary contact count needed for the control and indication circuit
- Match the enclosure rating to the environment (IP20 inside a panel, IP65 on the machine)
Specifications
INDUCTIVE SWITCH SQUARE TYPE PROXIMITY SENSOR IMF3 | 外形尺寸
OVERALL DIMENSIONS | | | | 检测距离 DETECTION DISTANCE 5mm | | 埋
入
式
F
l
u
s
h | 直流
DC
10-
30
VDC 交流
AC
90-
250
VAC | NPN | NO | IMF3-5-DNA | | NC | IMF3-5-DNB | | NO+NC | | | PNP | NO | IMF3-5-DPA | | NC | IMF3-5-DPB | | NO+NC | | | 二线制
two wire
system | NO | IMF3-5-DLA | | NC | IMF3-5-DLB | | SCR
可控硅
Control-
lable
silicon | NO | | | NC | | | NO+NC | | | 继电器输出Relay output | | | | 检测距离 DETECTION DISTANCE | | 非
埋
入
式
F
l
u
s
h | 直流
DC
10-
30
VDC 交流
AC
90-
250
VAC | NPN | NO | | | NC | | | NO+NC | | | PNP | NO | | | NC | | | NO+NC | | | 二线制
two wire
system | NO | | | NC | | | SCR
可控硅
Control-
lable
silicon | NO | LMF3-2005A | | NC | LMF3-2005B | | NO+NC | | | 继电器输出Relay output | | | 输出电流
Controloutput | DC | 200mA | | SCR/继电器 Relay | | | 输出电压降Output voltagc dropDC/AC | 直流(NPN PNP)型3V以下、二线型：3.9V以下、交流AC 10V以下 DC<3V、AC<10V | | 消耗电流Consumption current | 直流(NPN PNP)型DC 12V时8mA、24V时15mA、交流AC 10mA以下DC<15mA、AC<10mA | | 标准检测物体Standard detected object | 20X20X1(A3铁iron) | | 重复精度Repeated precision | 0.02 | | 响应频率DC/AC | 400Hz/25Hz | | 工作环境温度Working environment temperature | -25℃～+75℃ | | 绝缘电阻Insulation resistance | 50MΩ | | 外壳材料Shell material | ABS树脂Resin | | 防护等级Protection grade | IP67 | | 可替代国内型号Altemative model at home and abroad | PS17-5PN | |
Frequently asked questions about the Square type inductance proximity sensors IMF3
What is the difference between a contactor and a relay?
A contactor is built for switching power circuits repeatedly at high current, often with motor duty ratings (AC-3) and arc-suppressing chambers. A relay switches control signals at low current. In practice: contactor for the motor, relay in the control circuit that drives the contactor coil.
How do I calculate the correct contactor size for a motor?
Use the motor's full-load current, apply the AC-3 rating for the operating voltage, and allow for the number of starts per hour. As a rule of thumb, the contactor's AC-3 rating should be at least equal to the motor FLC, then step up one frame if the duty is heavy.
Do you supply the coil voltage I need?
Coil voltages are specified per order. Send the model number, coil voltage and frequency you require and we will confirm availability and lead time.
Are auxiliary contacts included?
Base models come with the standard auxiliary contact configuration for that frame. Add-on auxiliary blocks and mechanical interlocks can be quoted with the contactor.
Further reading
