Instruction manual [PDF] (32 pages)
- Updated: 25.03.2026
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INSTRUCTION MANUAL
Read and understand instructions before use.
Ex d ia IIC T4, Gb, IP65
-20° C to 50° C
DEMKO 12 ATEX 1102012
0891 II 2 G
SENSIT® GOLD instruments are Approved
UL913,
For Class 1, Division 1, Groups A, B, C and D
Hazardous locations when used with approved
alkaline batteries or rechargeable battery pack.
IP65
Temp code: T4, -20° C to 50° C
7WA6
SENSIT® P400 GAS MONITOR
For use with combustible gases and optionally available oxygen and toxic gases.
Intrinsically safe for use in:
Manufactured by:
SENSIT Technologies
1.888.475.5235
[email protected]
SENSIT-Direct.com
Warning!
To reduce the risk of explosion do not mix old batteries with used batteries, or
mix batteries from different manufacturers.
Warning:
To prevent ignition of flammable or combustible atmospheres, disconnect
power before servicing.
Warning:
Substitution of components may impair intrinsic safety.
Warning:
Not for use in atmosphere of oxygen greater than 21%
Warning:
To prevent the risk of ignition of flammable atmospheres, batteries must only
be changed in an area known to be non-hazardous.
Warning:
To maintain intrinsic safety, service must be performed by factory authorized
technicians with approved replacement parts only.
CAUTION:
Lithium backup cell may explode if mistreated. Do not recharge, disassemble
or dispose of in fire.
1.888.475.5235
[email protected]
SENSIT-Direct.com
SENSIT® P400 Instruction Manual
TABLE OF CONTENTS
General Description................................... 4
Parts and Accesories.................................. 5
Physical Specificaitons................................ 6
Safety Precautions...................................... 6
Operational Specificaitons.......................... 7
Sensor Specifications & Alarms................9-10
Function Indicators................................... 11
Battery Installation................................12-13
Operation and Use..............................14-22
Bump Test - Calibration............................. 23
P400 Motorized Pump.............................. 27
User Menu..........................................28-30
Warranty.................................... Back Cover
3
1.888.475.5235
[email protected]
SENSIT-Direct.com
4
General Description
The Sensit P400 is a state of the art personal gas monitor used to alert users of
potentially hazardous gases in the work area. This monitor may have 1-5 sensors
installed including combustible gas (LEL only), oxygen and/or 2 additional toxics
such as CO, SO2, HCN and H2S. A combination CO/H2S sensor is available
as a single sensor location.
Alarms are in 3 forms. Audible alarms are 98db; visual via 6 super-bright
LEDS and enhanced display readings; vibration from the vibrating motor. Unique
alarms for Low level (preset), time weighted average (TWA) based on 8 hour
average exposure maximums, short term exposure limit (STEL) based on 15 minute
average exposure maximums, high levels for immediate health threats, total or
accumulated exposure over time, and “high-high” for potential immediate danger.
Operator safety is uniquely and efficiently increased with the use
of the Immediate Detection System (IDS). The IDS provides the
operator a tick style indication that gas conditions are changing,
before the alarm level. If so equipped, this feature can be enabled
through the supervisor menu.
The housing is made of a field proven brand of polycarbonate (LEXAN) with a
permanently adhered rubber-like protective outer covering. This is resilient to
environmental factors and most impacts.
The buttons located on the side of the housing provide simple and intuitive user
operation.
The user menu has several user functions plus a supervisor set-up selection.
This allows a supervisor to make adjustments to those operational features field
personnel should not be adjusting. This is password protected.
A graphic display provides all readings and information. On screen prompts
and information make use very simple.
A single green LED at the top indicates the instrument is functioning properly,
bump test and calibration have been performed as required.
Calibration is accomplished either manually using the menu function or using a
SCal 400 automatic docking station. The manual calibration process is extremely
simple. Once the menu item is selected attach the gas and wait for the process
to be completed.
Data logging is automatic if enabled. The internal memory provides approximately
75 hours of capacity. Uploading is accomplished using the Link-400 Station with
SmartLink Sofware.
1.888.475.5235
[email protected]
SENSIT-Direct.com
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