The sensor that DTA use is a Bosch 0 258 104 002 which is one that
Webcon supply to Mountune and Pectel for their logging systems. I
understand that it is quite special in the way it operates and
the original fitment is actually a MAN truck!  It features four
wires. Two for the sensor (black=signal, grey=earth), and two for
the heater element inside the sensor. I've yet to determine how the
heater works. It may just be required for starting, to get the sensor
in to its calibrated operating range.  I've shortened the leads, as
they were 2M long! I've used an Amphenol water proof connector from
WWW.RSWWW.COM, #246-8436. I've also had to crimp the connectors to
the wires using a special crimp tool, borrowed from work, as the
grey wire from the sensor just would not take any solder. Its as
if its made from steel wire, and not the usual tinned copper wire,
so forget trying to solder any connectors on to this sensor cable.


$Date: Thu, 12 Feb 1998 07:48:24 -0500 (EST)
$From: Frank F Parker <fparker@umich.edu>
$Subject: Re: LSM-11 source
On Wed, 11 Feb 1998, bruce plecan wrote:
All I have been able to find is the 3 temp curves from Bosch. Maybe
Steve Lamb in Aust has been able to get other info.
        Bosch part #: 0-258-104-002
        Bosch Chicago: 708-865-5244
        Data sheet # (9 pages):Y 258 K02 078
        Good Bosch Distb(has LSM11 in stock): Mech-Tronic
                                              NY area
                                              516-423-0523 ph
                                
The sensor has essentially the same output curve as production car
sensors but is specially made for repeatability and low flow over
sensor element. Thus one can replace prod sensor with lsm11 and connect
to both logger/dvm/? and the car ecm as long as device connected is
of high impedance. The NTK can not as output curve is bipolar.
Want even more background: see "Automotive Electronics Handbook" by
Ronald Jurgen. Chapter 6, Exhaust Gas Sensors, is written by
HM Wiedenmann, Bosch GmbH, Lambda Oxygen Sensor Development.
Regards,
Frank Parker