ZeroDT Field Sensor Surge Protectors
We’ve created a superior line of field sensor surge protection products. Our units protect your electrically sensitive electronics and machinery from electrical voltages and surges currents that can damage or destroy your equipment.
Choose your voltage by clicking one of the red buttons below.
ZeroDT 12-1
- 12 volt, single loop or 2-wire applications
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The design of the ZeroDT 12-1 utilizes the latest generation, non-degrading Silicon Avalanche Suppression Diodes (SASDs), to protect transmitters, gas detection sensors & systems, level equipment, flow measurement devices as well as other field instrumentation against transient over-voltages. This SASD technology provides continuous, bi-directional, and bi-polar (both positive and negative) protection that returns to its original state once the over-voltage has passed. The unit is designed to limit the energy of these over-voltage surges on analog current loops, and RS-485/422, DeviceNet, Fieldbus communication lines as well as low voltage DC power lines. The module is small enough to allow it to be mounted directly into a measurement device’s explosion-proof housing, or other small electrical housings, and getting the protection as close as possible to the device to allow for the best possible protection.
- Nominal Voltage: 12Vdc
- Max Cont. Operating Voltage: 18Vdc
- Maximum Surge Current (Ipeak)
- 8/20µs, Line to-Ground: >600 Amps
- 10/1000µs, Line to-Ground: 65 Amps
- Product Dimensions: 12mm H x 12mm W x 18mm D
- Wiring: (Positive/Negative) 1 White Wire + 1 Red Wire, (Grounding) 1 Green Wire
- UL Listed for use in ordinary as well as Class 1, Div 2 Hazardous Locations
ZeroDT 12-2
- 12 volt, 2 loop or 4-wire applications
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The design of the ZeroDT 12-2 utilizes the latest generation, non-degrading Silicon Avalanche Suppression Diodes (SASDs), to protect transmitters, gas detection sensors & systems, level equipment, flow measurement devices as well as other field instrumentation against transient over-voltages. This SASD technology provides continuous, bi-directional, and bi-polar (both positive and negative) protection that returns to its original state once the over-voltage has passed. The unit is designed to limit the energy of these over-voltage surges on analog current loops, and RS-485/422, DeviceNet, Fieldbus communication lines as well as low voltage DC power lines. The module is small enough to allow it to be mounted directly into a measurement device’s explosion-proof housing, or other small electrical housings, and getting the protection as close as possible to the device to allow for the best possible protection.
- Nominal Voltage: 12Vdc
- Max Cont. Operating Voltage: 18Vdc
- Maximum Surge Current (Ipeak)
- 8/20µs, Line to-Ground: >600 Amps
- 10/1000µs, Line to-Ground: 65 Amps
- Product Dimensions: 18.7mm H x 25.1mm W x 12.7mm D
- Wiring: (Positive/Negative) 2 White Wire + 2 Red Wire, (Grounding) 1 Green Wire
- UL Listed for use in ordinary as well as Class 1, Div 2 Hazardous Locations
ZeroDT 24-1
- 24 volt, single loop or 2-wire applications
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The design of the ZeroDT 24-1 utilizes the latest generation, non-degrading Silicon Avalanche Suppression Diodes (SASDs), to protect transmitters, gas detection sensors & systems, level equipment, flow measurement devices as well as other field instrumentation against transient over-voltages. This SASD technology provides continuous, bi-directional, and bi-polar (both positive and negative) protection that returns to its original state once the over-voltage has passed. The unit is designed to limit the energy of these over-voltage surges on 4-20 mA current loops, and RS-485/422, DeviceNet, Fieldbus communication lines as well as low voltage DC power lines. The module is small enough to allow it to be mounted directly into a measurement device’s explosion-proof housing, or other small electrical housings, and getting the protection as close as possible to the device to allow for the best possible protection.
- Nominal Voltage: 24Vdc
- Max Cont. Operating Voltage: 36Vdc
- Maximum Surge Current (Ipeak)
- 8/20µs, Line to-Ground: >600 Amps
- 10/1000µs Line to-Ground: 65 Amps
- Product Dimensions: 12.4mm H x 12.4mm W x 18.9mm D
- Wiring: (Positive/Negative) 1 White Wire + 1 Red Wire, (Grounding) 1 Green Wire
- UL Listed for use in ordinary as well as Class 1, Div 2 Hazardous Locations
ZeroDT 24-2
- 24 volt, 2 loop or 4-wire applications
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The design of the ZeroDT 24-2 utilizes the latest generation, non-degrading Silicon Avalanche Suppression Diodes (SASDs), to protect transmitters, gas detection sensors & systems, level equipment, flow measurement devices as well as other field instrumentation against transient over-voltages. This SASD technology provides continuous, bi-directional, and bi-polar (both positive and negative) protection that returns to its original state once the over-voltage has passed. The unit is designed to limit the energy of these over-voltage surges on 4-20 mA current loops, and RS-485/422, DeviceNet, Fieldbus communication lines as well as low voltage DC power lines. The module is small enough to allow it to be mounted directly into a measurement device’s explosion-proof housing, or other small electrical housings, and getting the protection as close as possible to the device to allow for the best possible protection.
- Nominal Voltage: 24Vdc
- Max Cont. Operating Voltage: 65Vdc
- Maximum Surge Current (Ipeak)
- 8/20µs, Line to-Ground: >600 Amps
- 10/1000µs, Line to-Ground: 65 Amps
- Product Dimensions: 18.7mm H x 25.1mm W x 12.7mm D
- Wiring: (Positive/Negative) 2 White Wires + 2 Red Wires, (Grounding) 1 Green Wire
- UL Listed for use in ordinary as well as Class 1, Div 2 Hazardous Locations
ZeroDT 48-1
- 48 volt, single loop or 2-wire applications
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The design of the ZeroDT 48-1 utilizes the latest generation, non-degrading Silicon Avalanche Suppression Diodes (SASDs), to protect 48-volt devices such as transmitters, gas detection sensors & systems, level equipment, flow measurement devices as well as other field instrumentation against transient over-voltages. This SASD technology provides continuous, bi-directional, and bi-polar (both positive and negative) protection that returns to its original state once the over-voltage has passed. The unit is designed to limit the energy of these over-voltage surges on analog current loops, and digital communication lines as well as low voltage DC power lines. The module is small enough to allow it to be mounted directly into a measurement device’s explosion-proof housing, or other small electrical housings, and getting the protection as close as possible to the device to allow for the best possible protection.
- Nominal Voltage: 48Vdc
- Max Cont. Operating Voltage: 65Vdc
- Maximum Surge Current (Ipeak)
- 8/20µs, Line to-Ground: >600 Amps
- 10/1000µs, Line to-Ground: 65 Amps
- Product Dimensions: 18.7mm H x 25.1mm W x 12.7mm D
- Wiring: (Positive/Negative) 1 White Wire + 1 Red Wire, (Grounding) 1 Green Wire
- UL Listed for use in ordinary as well as Class 1, Div 2 Hazardous Locations
ZeroDT 120-1
- Single loop or 2-wire applications, with voltage up to 120 Vac or 170 Vdc
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The design of the ZeroDT 120-1 utilizes the latest generation, non-degrading Silicon Avalanche Suppression Diodes (SASDs), to protect 120 VAC or 170 Vdc devices such as transmitters, gas detection sensors & systems, level equipment, flow measurement devices as well as other field instrumentation against transient over-voltages. This SASD technology provides continuous, bi-directional, and bi-polar (both positive and negative) protection that returns to its original state once the over-voltage has passed. The unit is designed to limit the energy of these over-voltage surges on analog current loops, and digital communication lines as well as low current power lines. The module is small enough to allow it to be mounted directly into a measurement device’s explosion-proof housing, or other small electrical housings, and getting the protection as close as possible to the device to allow for the best possible protection.
- Nominal Voltage: 120Vac or 170Vdc
- Max Cont. Operating Voltage: 138Vac or 195Vdc
- Maximum Surge Current (Ipeak)
- 8/20µs, Line to-Ground: >600 Amps
- 10/1000µs Line to-Ground: 65 Amps
- Product Dimensions: 12.7mm H x 25.1mm W x 32.1mm D
- Wiring: (Positive/Negative) 1 White Wire + 1 Red Wire, (Grounding) 1 Green Wire
- UL Listed for use in ordinary as well as Class 1, Div 2 Hazardous Locations
ZeroDT FM-2
- Single loop or 2-wire protection inside a conduit enclosure for hazardous locations
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The FM-2 can be utilized as a ‘conduit junction box’ (with built-in surge protection) to install next to the device you want to protect. The ZeroDT FM-2 is a solution for providing external overvoltage transient (surge) protection for a single pair of conductors such as the 4-20 mA current loop pair to/from a device, or the output signal pair of a flow meter, or any 2 lines to/from other types of measurement devices. The ZeroDT FM-2 consists of a Type 4X, cast aluminum enclosure designed for use in hazardous locations (Class 1, Div 1) that has a ZeroDT 24-2 unit mounted inside of the housing, along with a terminal block. The ZeroDT 24-2 unit utilizes state-of-the-art advanced semiconductor SASD technology to provide fast, non-degrading protection against surges and lightning induced transients for each of the lines (conductors) with 1,200 Amps of 8/20 μs surge current protection.
- Nominal Voltage: 24 Vdc
- Max. Cont. Operating Voltage: 36 Vdc
- Maximum Surge Current (Ipeak)
- 8/20 µs, Line-to-Ground: >1,200 Amps
- 10/1000 µs, Line-to-Ground: >130 Amps
- Enclosure conduit openings: Qty 2, ¾” NPT
- Wiring: Terminal block, #24 to #10 AWG conductors
ZeroDT FM-4
- 2 loop or 4-wire protection inside a conduit enclosure for hazardous locations
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The FM-4 can be utilized as a ‘conduit junction box’ (with built-in surge protection) to install next to the device you want to protect. The ZeroDT FM-4 is a solution for providing external overvoltage transient (surge) protection for 2 pairs of conductors such as the power input pair and output signal pair of a flow meter, or the 2 pairs to a multi-variable transmitter, or up to 4 lines to/from other types of measurement devices. The ZeroDT FM-4 consists of a Type 4X, cast aluminum enclosure designed for use in hazardous locations (Class 1, Div 1) that has two (2) of the ZeroDT 24-2 units mounted inside of the housing, along with a 4-position terminal block. The ZeroDT 24-2 units utilize state-of-the-art advanced semiconductor SASD technology to provide fast, non-degrading protection against surges and lightning induced transients for each of the 4 lines (conductors) with 1,200 Amps of 8/20 μs surge current protection.
- Nominal Voltage: 24 Vdc
- Max. Cont. Operating Voltage: 36 Vdc
- Maximum Surge Current (Ipeak)
- 8/20 µs, Line-to-Ground: >1,200 Amps
- 10/1000 µs, Line-to-Ground: >130 Amps
- Enclosure conduit openings: Qty 2, ¾” NPT
- Wiring: Terminal block, #24 to #10 AWG conductors
ZeroDT FM-8
- 4 loop or 8-wire protection inside a conduit enclosure for hazardous locations
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The FM-8 can be utilized as a ‘conduit junction box’ (with built-in surge protection) to install next to the device you want to protect. The ZeroDT FM-8 is a solution for providing external overvoltage transient (surge) protection for up to 4 pairs of conductors in/out of a device such as the power input pair, output pulse signal pair of a flow meter as well as 2 more pairs for digital communications or alarms. The ZeroDT FM-8 consists of a Type 4X, cast aluminum enclosure designed for use in hazardous locations (Class 1, Div 1) that has two (2) of the ZeroDT I/O-24 units mounted to a DIN rail inside of the housing. The ZeroDT I/O-24 units utilize state-of-the-art advanced semiconductor SASD technology to provide each of the 8 lines with independent protection against surges and lightning induced transients that is extremely fast and non-degrading (each of the 8 lines has its own 1,200 Amps of 8/20 μs surge current protection).
- Nominal Voltage: 24 Vdc
- Max. Cont. Operating Voltage: 36 Vdc
- Maximum Surge Current (Ipeak)
- 8/20 µs, Line-to-Ground: >1,200 Amps
- 10/1000 µs, Line-to-Ground: >130 Amps
- Enclosure conduit openings: Qty 3, ¾” NPT
- Wiring: screw compression lug, #26 to #14 AWG conductors
ZeroDT FM-12
- 6 loop or 12-wire protection inside a conduit enclosure for hazardous locations
- Analog signals (4-20 mA), discrete digital inputs/signals, pulsed inputs/outputs, RS-485/422/232 & digital communications as well as DC power lines.
The FM-12 can be utilized as a ‘conduit junction box’ (with built-in surge protection) to install next to the device you want to protect. The ZeroDT FM-12 is a solution for providing external overvoltage transient (surge) protection for up to 6 pairs of conductors in/out of a device such as the power input pair, output pulse signal pair of a flow meter as well as 3 more pairs for digital communications and/or alarms. The ZeroDT FM-12 consists of a Type 4X, cast aluminum enclosure designed for use in hazardous locations (Class 1, Div 1) that has two (3) of the ZeroDT I/O-24 units mounted to a DIN rail inside of the housing. The ZeroDT I/O-24 units utilize state-of-the-art advanced semiconductor SASD technology to provide each of the 12 lines with independent protection against surges and lightning induced transients that is extremely fast and non-degrading (each of the 12 lines has its own 1,200 Amps of 8/20 μs surge current protection).
- Nominal Voltage: 24 Vdc
- Max. Cont. Operating Voltage: 36 Vdc
- Maximum Surge Current (Ipeak)
- 8/20 µs, Line-to-Ground: >1,200 Amps
- 10/1000 µs, Line-to-Ground: >130 Amps
- Enclosure conduit openings: Qty 3, ¾” NPT
- Wiring: screw compression lug, #26 to #14 AWG conductors