BNS40S Magnetic Safety Switch, Stainless Steel, 100 V ac/dc

  • RS Stock No. 880-1817
  • Mfr. Part No. BNS40S-12ZG-C
  • Brand Schmersal
Technical Reference
Legislation and Compliance
RoHS Certificate of Compliance
COO (Country of Origin): DE
Product Details

Schmersal BNS40S Non Contact Safety Switch

The BNS40S is a stainless steel non-contact safety switch that is ideal for use in the food and beverage industry. It is hygiene-compliant and can easily be integrated into the surrounding construction due to its compact design.
The stainless steel enclosure of the BNS 40S is resistant to corrosion and cleaning liquids. Sealed to protection class IP69K, the enclosure was also designed to prevent the formation of dust traps and pockets where dirt can settle. Other features are the very large temperature range and the easy-to-clean door hinge. The large switching distance enables a concealed mounting of the switch behind non-ferromagnetic covers.
The BNS 40S meets all the requirements of the “Hygienic Design” and can also be used in wet areas. Its cables have been selected in accordance with the FDA requirements and the sensor is UL and ECOLAB certified. As the actuator can be actuated from two sides, the new magnetic safety switch can be flexibly fitted. Where required, a magnetic latching option is also available.
The mounting dimensions and switching distances of the BNS 40S are identical to those of the tried-and-tested BNS 33S. The user can therefore replace an existing BNS 33S with a new stainless steel sensor without needing to change the surrounding construction.

Stainless steel enclosure
Cable connection suitable for the food industry
Concealed mounting possible
Dimensions: 88 x 27 x 14.5 mm
Long life
No mechanical wear
Insensitive to soiling
Insensitive to transverse misalignment
Especially easy to clean through concealed threaded holes at the rear
Suitable for food processing industry


Actuator must be ordered separately, stock no. 880-1810.
Stock no. 880-1817 has LEDs to display switching conditions.


EN ISO 13849-1, IEC 60947-5-3, BG-GS-ET-14.


BG, cULus.

Attribute Value
Supply Voltage 100 V ac/dc
Housing Material Stainless Steel
Connection Type 1m cable
Switch Type Rectangular
Terminal Type Cable
Series BNS40S
Switching Distance 8 (On) mm, 18 (Off) mm
IP Rating IP69K
Supply Current Maximum of 250 mA
Actuator Included No
Width 14.5mm
Length 88mm
Depth 27mm
Standards Met BG, BG-GS-ET-14, CE Listed, CULus Listed, EN ISO 13849-1, IEC 60947-5-3
Dimensions 88 x 14.5 x 27 mm
Number of Approach Directions 1
Sensor Principle Magnetic
Safety Category
Actuator Type Coded
Available to back order for despatch 02/11/2020
Price Each
£ 112.70
(exc. VAT)
£ 135.24
(inc. VAT)
Per unit
1 +
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