$26.49 EX GST
The Comus CM1761-9 is a precision mercury tip-over switch designed for reliable and spark-free detection of vertical tilt conditions. Encapsulated in a hermetically sealed glass and metal body filled with inert gas and a mercury pool, this switch ensures long operating life, ultra-low contact resistance, and consistent performance across a 360° sensing field around the vertical axis.
With a nominal 15° operating angle, the CM1761-9 is ideal for safety-critical applications where tip-over or loss-of-upright position must be detected quickly and reliably—such as in portable heaters, appliances, instrumentation, and industrial systems.
This switch operates quietly and cleanly compared to mechanical ball-based designs, and features a typical 120 Vac / 1.5 A / 200 VA switching capacity (check CM1761-9 datasheet for specific ratings).
30 in stock (can be backordered)
Comus CM1761-9 Mercury Tip-Over Switch – 15° Operating Angle
The Comus CM1761-9 is a mercury tip-over switch designed for reliable, spark-free detection of tilt and loss-of-vertical conditions.
Using a sealed glass/metal capsule filled with inert gas and a small mercury pool, the switch provides exceptionally low contact resistance, quiet operation and long life compared with mechanical ball tilt devices.
This device is intended for tip-over safety and position sensing in applications such as portable heaters, appliances, instrumentation and industrial equipment where a defined trip angle around the vertical axis is required.
Within the Comus mercury tip-over family, typical ratings are up to 120 Vac and 1.5 A with a maximum switching capacity of around 200 VA, and a nominal 15° operating angle (refer to the specific CM1761-9 datasheet to confirm exact ratings before design-in).
Key features
- Mercury tip-over switch – designed for 360° sensing around a vertical axis
- Nominal 15° operating angle from vertical for trip/break
- Hermetically sealed glass construction with inert gas fill
- Spark-free, self-cleaning contacts for long life and low resistance
- Typical ratings up to 120 Vac, 1.5 A, 200 VA (family data – confirm against CM1761-9 datasheet)
- Omni-directional operation around the vertical axis
- Ideal for tip-over safety cut-off in heaters, appliances and portable equipment
Typical applications
- Tip-over safety shut-down in portable heaters and radiators
- Appliance safety cut-off and position detection
- Level and tilt monitoring
- Industrial and commercial safety interlocks
- Security and tamper detection systems
Mercury and regulatory note
This product contains a small quantity of mercury. As with all Comus mercury switches, it is intended for use in equipment and regions where mercury devices remain permissible under local regulations.
It must not be opened or tampered with, and must be handled and disposed of in accordance with applicable environmental legislation and best practice for hazardous waste.
For new designs in jurisdictions where mercury is restricted, consider the Comus non-mercury tilt and tip-over series as an alternative.
Important design note
The electrical and mechanical data below are based on the Comus 15° mercury tip-over switch family (e.g. CM1715 and related series).
Please verify all key parameters against the specific CM1761-9 product datasheet before committing to production or safety-critical applications.
Technical Specifications (Typical – Comus 15° Mercury Tip-Over Family)
| Manufacturer | Comus International |
|---|---|
| Manufacturer Part | CM1761-9 (mercury tip-over switch) |
| Switch type | Mercury tip-over / tilt switch |
| Contact form | Typically SPST, normally closed (tilt to open) – confirm for CM1761-9 |
| Operating angle | 15° ± 3° from vertical (typical family value) |
| Switching voltage (max) | 120 Vac (typical family rating) |
| Switching current (max) | 1.5 A @ 120 Vac (typical CM1715-style rating) |
| Switching capacity (max) | Approx. 200 VA (family reference) |
| Contact resistance (max) | 5 Ω (initial, typical family specification) |
| Operating temperature | -37 °C to +100 °C (typical Comus mercury tip-over rating) |
| Storage temperature | -40 °C to +125 °C (typical) |
| Construction | Hermetically sealed glass/metal capsule with mercury |
| Mounting | Leaded device – typically mounted within a sealed enclosure or assembly |
| Operating orientation | Tip-over sensing around vertical axis, omni-directional |
| RoHS / mercury | Contains mercury – not RoHS for general EU consumer equipment; use only where exempt or permitted |
Note
240 Vac operation
CM1761-9 is a mercury tip-over switch intended primarily for low-power control circuits. Electrical ratings (maximum voltage, current and VA) are specified in the CM1761-9 datasheet and are typically given for operation up to 120 Vac.
For 230–240 Vac systems, the device should be used to switch low-current control signals only (for example, the coil of a relay or contactor, or an ELV control circuit), and not as the sole means of interrupting high-current heater loads. Always ensure the contact VA limit is respected and that the overall design complies with local electrical safety regulations.
Documentation
Comus CM1761-9 Mercury Tip-Over Switch – Datasheet (PDF)
| Weight | 0.09 kg |
|---|---|
| Dimensions | 15.85 × 15.85 × 15 mm |
Brand
Comus
Be the first to review “Comus CM1761-9 Mercury Tip-Over Switch – 15° Operating Angle”
Related products
Reviews
There are no reviews yet.