Name

Three-dimensional presence detector

Model

D-TP

Object
to be
measured

Human body Operator’s hand

Description

This device is a safe-operation support sensor designed to prevent operators from being caught in the rollers of a large printing machine or in a plastic extruder. The three-dimensional presence detector is also suitable as a non-contact presence switch for applications other than safety systems.

Operating
principles

The detector circuitry incorporates DITECH’s proprietary impedance bridge system. The value of capacitance between the sensor and a roller with no object inside differs from the value if an operator’s hand is inside. The detector detects this change and issues an alarm or an emergency stop signal to the machine.

Features

The three-dimensional presence detector differs from photoelectric sensor-based safety systems (e.g., area sensors) available on the market due to the presence of the following features:

Not actuated by insulating dielectric bodies, such as a film or a piece of rubber, entering the detection area
(Photoelectric sensor-based systems might be erroneously actuated by a film blocking the beam.)
Non-contact operation due to the detection of changes in capacitance of a three-dimensional space
Three types of capacitance detection system are used to cover various machines and detection areas.

Specifications

Measurement system	Impedance bridge system
Measurement range	According to user's specifications.
Output signal	DC4～20mA　DC1～5V　※One of the above signal
Input power	Model D-TP (Model PS-TP)：　AC105V/210V 50/60Hz or DC24V
Power consumption	10W
Allowable temperature	Sensor：　－25℃～＋100℃ Transducer：　Model PS-TP：　－20℃～＋70℃
Installation	Sensor：　Bolt nut mounting, etc.
Material	Sensor：　SUS304, etc.

Configuration

Model D-TP
(Non-explosion-proof type)

Sensor

Alarm set station

PS-TP

Options (D-TP)

Lightning arrestor

Monitoring device

Products and Service

Level switches

Capacitive Level switch

Model NQH / Model NSH

Net capacitive Level switch

Model DLS

General-purpose Capacitive Level switch

Model OCT

Impedance type Level switch

Model NQS / Model NSS

Guard type Level switch

Model NQS-G / Model NSS-G

Vibrating Level switch

Model DTA / Model STA

Vibrating flat Level switch

Model DTA-F / Model STA-F

Vibrating Level switch for sediment

Model DTA-D / Model STA-D

General-purpose Vibrating Level switch

Model DTA-G / Model STA-G

Level switch for molten metals

Model DIM-LS / ModelIPM-LS

Conductive Level switch

Model NQS-CL・DR-L / Model NSS-CL

Blower-equipped Level switch

Model NQH・DTA-BL / Model NSH・STA-BL

Level transmitters

Capacitive Level transmitter

Model QBS / Model NSB

Impedance type Level transmitter

Model IP-QBS / Model IP-NSB

Guard type Level transmitter

Model QBS-G / Model NSB-G

Self-balancing interface Level transmitter

Model NQC / Model NSC

Level transmitter for molten metals

Model DIM

Level transmitter for vertical piping

Model QBS-VP / Model NSB-VP

Blower-equipped Level transmitter

Model QBS-BL / Model NSB-BL

Capacitive Level transmitter for large tanks

Model QBS-LL / Model NSB-LL

Vertically anchored wire Level transmitter for large tanks

Model QBS-AW / Model NSB-AW

Non-contact self-balancing Level transmitter

Model DNC

Level transmitters for liquid

Capacitive water・fluid Level transmitter

Model QBS-WF / Model NSB-WF

Capacitive interface Level transmitter

Model QBS-IF / Model NSB-IF

Impedance type fluid Level transmitter

Model IP-QBS-FL / Model IP-NSB-FL

Impedance type interface Level transmitter

Model IP-QBS-IF / Model IP-NSB-IF

Relative permittivity-correcting Level transmitter

Model QBS-DC / Model NSB-DC

Float type Level tramsmitter

Model FM / Model FS

Various transmitters

Vibrating viscometer

Model QBS-V / Model NSB-V

Electrostatic voltmeter

Model S-21

Electrostatic ammeter

Model S-22

Vibrating Densitometer

Model QBS-D / Model NSB-D

Vibrating Coagulometer

Model QBS-C / Model NSB-C

Capacitive Moisture meter

Model QBS-MM / Model NSB-MM

Turbine Flow meter

Model DM-11 / Model TM-11

Buildup meter and Densitometer

Model QBS-CT

Electromagnetic induction type metal detector

Model DIM-MD

Vibrating viscometer for laboratory

Model V-1

Transmitters for liquid

Relative-permittivity meter

Model QBS-RP / Model NSB-RP

Conductivity meter

Model QBS-CM / Model NSB-CM

Minimal-leakage meter for piping

Model QBS-LE / Model NSB-LE

Capacitive oil-in-water meter

Model QBS-OW / Model NSB-OW

Capacitive moisture-in-oil meter

Model QBS-MO / Model NSB-MO

Weir type Flowmeter

Model QBS-FM / Model NSB-FM

Various detectors

Lump detector

Model D-S / Model LD-11

Moisture detector for large flexible containers

Model D-MF

Piping powder flow detector

Model OBS-PF / Model NSB-PF

Microwave-based flowing-powder detector

Model D-MM3

Impact type falling-powder detector

Model D-I

Three-dimensional presence detector

Model D-TP

Photoelectric film detector

Model D-TF

Portable moisture detector

Model D-MP

Detectors for liquid

Conductive switch

Model NQS-CS・DR / Model NSS-CS

μm-class ultrathin oil film detector

Model QBS-OFμ / Model NSB-OFμ

mm-class oil film detector

Model NQH-OFm / Model NSH-OFm

Drain pipe leakage detector

Model NQS-LE / Model NSS-LE

Moisture detector for quenching oil

Model D-Q

Foam detecting switch

Model NQH・NQS-FO / Model NSH・NSS-FO

Various options

Level switch operation checker

Model OC-NH

Operation indicator lamp for Level switch

Model NQH-○○○W / Model DTA-○○○W

Operation indicator lamp for general-purpose Level switch

Model OCT-○W

Integrated type indicator

Model ○○○-W

Separated type indicator

Model LI-100

Electrostatic capacitance measuring device

Model DM-C

Capacitance generator

Model SVC-500 / Model SVC-1000

Fixed resistor for conductivity meter

Model CM-R

Small measurement probe for laboratories

Model DL-MP

Oil film detector alarm setting device

Model AS-3

Static arrestor

Model SP-2