Explosion-Proof Nema 4, 4x, 7 & 9
The SENTINEL has been designed to provide the most visible and reliable valve position indication in explosion-proof environments. Moniteur’s Engineered Loc-Ring Cam and Shaft retention system allows a multi-million cycle life, even in harsh environments.
With both UL and CSA approvals, the Sentinel is the clearly the best choice.
Approvals
UL / CSA Approved for Class 1, Division 1 Groups C-D and Class 2, Division 1 Groups E, F, G with Mechanical SPDT and DPDT switches.
UL / CSA Approved for Class 1, Division 2 Groups A, B and Class 1, Division 1 Groups C-D and Class 2, Division 1 Groups E, F, G with TTL SPDT Non-Contact Switches.
More Information:
Features & Benefits of Moniteur’s Watchman VPT
- Clear Ektar cover offers excellent chemical resistance and strength
- Environmentally sealed indicator on the top of the unit prevents fogging or entry of contaminants.
- The indicator has a rated minimum life of 1,000,000 cycles. Moniteur has indicators still in service with over 9 million cycles behind them!
- Indicator is 100% adjustable to any valve or actuator.
- Internal Switches and terminal block are labeled for easier installation.
- Indicator shaft is secured to the housing with Moniteur’s engineered Loc-Ring Cam and Shaft Retention System, ensuring sensing accuracy and a multi-million cycle life.
- The industry’s only “true” visual valve position indicator available for multi-port valves, adjustable to match the physical flow pattern of the valve. See the configurations below.
- “Flat cover” version available without indicator is a cost effective option where visual indication is not required.
- Optional thermoplastic quick-mount bracket for NAMUR actuators stands up to corrosive environments.
- Available with Moniteur’s wide variety of switches and sensors for today’s advanced control systems.
Intelligent Part Number System – Specify Your Watchman
1 – Series | 6 – Switch Type | ||
Watchman | F | Mechanical | |
2 – Cover | Cherry SPDT – 15A | 1 | |
With Moniteur | M | Prism Gold SPDT – 1A | 3 |
Flat Cover | F | ITW DPDT – 10A | 4 |
3 – Moniteur | Non-Contact (Proximity) | ||
No Indicator | N | Tungsten TTL SPDT- 3A | 2 |
Black / Yellow | Y | Rhodium TTL SPDT – 1A | T |
3-way path O | O | Bifurcated TTL SPDT – 3A | B |
3-way path T | T | Inductive Sensors | |
3-way path F | F | P&F NJ2 -V3 (NAMUR) | 8 |
4-way path S | S | P&F NBB3-V3-Z4 | K |
180 degree T | 1 | P&F NBB2-V3-US | KA |
Green / White | G | 7 – Switch Quantity | |
Red / White | R | 1-4 | 1-4 |
Blue / White | B | 8 – Conduit | |
Green / Red | A | (2) F 1/2″ NPT | 0 |
Red / Green | C | (2) 1/2″ + (1) F 1/2″ NPT | 6 |
4 – Bearing | (1) F 1/2 ” + (1) M 1/2 ” NPT | 8 | |
Bronze | B | Options – Add Suffix | |
303 Stainless | S | Output | |
5 – Shaft | Current 4-20 mA | 420 | |
Standard 303 SS | 1 | Resistive 0-1000 ohm | 1K |
Standard 316 SS | 3 | Other | |
NAMUR 303 SS | 5 | High Temperature to 212 F | HT |
NAMUR 316 SS | 7 | Viton Seals | V |
LONG NAMUR 303 SS | E | EDPM Seals | E |
PDF Spec Sheets for Common Items (click on part number for pdf)
Moniteur Switch and Sensor Selection Guide
Mechanical SPDT and DPDT Switches
The most popular switch for general purpose applications is rated 15A at 120 VAC and 2.5V at 24 VDC. Our standard mechanical switches are specified with higher operating forces and offer better resistance to freeze up. Gold Plated SPDT switches rated at 1A at 24 VDC are a low-cost alternative for intrinsically safe applications. DPDT Mechanical Switches rated at 10A / 125 VAC and 7A / 24VDC are also available. Specifications
Non-Contact TTL SPDT (proximity-type) Switches
These hermetically sealed switches set the standard for reliability. Tungsten TTL switches are used for high current AC and DC applications with a rating of 3A at 120 VAC and 2A at 24 VDC (100 Watts Max). Choose Rhodium TTL for low voltage / low current DC and Intrinsically Safe applications. Optional LEDs are also available on the Krystal TTL with Rhodium contacts. NOTE: Switches with Tungsten contacts are not recommended for DC signals lower than 50 mA. Specifications
NAMUR, PNP or NPN Inductive Sensors
A wide variety of industry standard sensors is available to interface with control systems found in today’s modern process plants. Specifications
Optional 4-20ma Transmitters and 0-1K ohm Potentiometers
Current or Resistive Output are available for 0-100% / 4-20mA feedback. Our electronics have been designed for severe applications and have been proven to outperform our competition in the toughest of environments.
Moniteur’s Visual Indicator Options
Black / Yellow
Green / White
3 Way Path T Reversed
120 degree “PIG”
Full Green / Full Red
Blue / White
3 Way Path F
3 Way 180 degree path T
Full Red / Full Green
3 Way Path O
3 Way Path T
0-100 % Digital
Red / White
3 Way Path O Reversed
3 Way Path F Reversed
3 Way Path S
